Jessica's parents are always telling her to turn off the lights when she leaves her room. The fixture in Jessica's room requires four bulbs that each use 75 watts of
electricity when they're on.
a. Jessica's parents estimate that she leaves the lights on unnecessarily for 2.5 hours per day. How many watt-hours of electricity are used by these bulbs during 2.5
hours?
b. Approximately how many kilowatt-hours of electricity are used in a year to keep these bulbs lit for 2.5 hours per day?
C. At a cost of $0.12 per kilowatt-hour, how much money is wasted per year by keeping these lights on unnecessarily? Round to the nearest dollar.
d. If five million people keep lights on as Jessica does, how much is wasted in unnecessary electric expenses?

Answers

Answer 1

Answer:

Step-by-step explanation:

4*75 = 300 watts ( her light)

a) 2.5*300=750 w/h

b) 365*750 = 273.75  Kw/h

c)   (0.12)*273.75 = $32.85

d) 32.85 * 5,000,000 = $164,250,000.00

Answer 2

Answer:

a.) 750

b.) 273.75

c.) $33.00

d.) $165,000,000.00


Related Questions

sorry if the lighting is bad
it's about number lines
no links

Answers

1st graph all the negative & positive numbers

The opposite of 2 is -2 because it's a negative number ( opposite of 2 )

• Check your work when you're done.
Your Assignment
A bag contains 5 marbles. There are 3 yellow marbles and 2 red marbles.
Suppose that Glen chooses a marble first and then Kris chooses one.
Answer the questions to show the probability that Kris will get a yellow marble if
Glen chooses a yellow one first.
1. What is the probability that Glen will get a yellow marble? Show how you
calculated this probability.
Write your answer in the space below.
i

Answers

If Glen get a yellow marble first then we have 2 yellow marbles...probability that Glen will get yellow marble is 2/5(we have just 2 yellow now and the total is 5)
2/5-answer☺️

62X + 310 =
2542 Find X

Answers

Answer:

36

Step-by-step explanation:

62x + 310 = 2542

62x = 2232

x = 36

Answer:

36

Step-by-step explanation:

62x + 310 = 2542

Subtract 310 from both sides

62x = 2,232

Then Divide by 62

x = 36

Enjoy.

How do you write 1.0x10^-3 in standard form?

Answers

Answer: 1/1000

Step-by-step explanation:

1 * 10^-3 = 1 * 1/10^3 = 1/1000

Answer:

NaN  -12

Step-by-step explanation:

The answer is the first or last option but I don’t know which one

Answers

Answer:

Third Option

Step-by-step explanation:

The triangles are congruent.

Answer:

the answer is C

Step-by-step explanation:

if you read the story again you will see why

Can someone help me pleaseeee

Answers

Answer:

For 20 tickets its 35 dollars

For 50 tickets its 87.50 dollars

For r tickets its 140 dollars

Step-by-step explanation:

A teacher asks five different students to write an equation with a solution of x = 4. The students and their equations are shown below.

Student Adrian Bert Camille Daniel Etsuko Equation 2x + 6 = 2 2x-9 = -1 - 2x + 12 = 4 2(x + 2) = 10 2(x - 10) = -12

Which of the following students correctly wrote an equation with x = 4 as the solution? Select three that apply.

A. Bert
B. Daniel
C. Etsuko
D. Adrian
E. Camille​

Answers

Answer:

I'm assuming the order corresponds the student to the equation. Because of this, the answer is simple:

Bert, Etsuko, and Camille.

Step-by-step explanation:

2x-9=-1, 2x=8, x=4

2(x-10)=-12, x-10=-6, x=4

-2x+12=4, -2x=-8, x=4

Classify the triangle: I NEED HELPPPP PLEASEEEEEEEEEEEEE

Answers

Answer:

Right scalene

Step-by-step explanation:

The triangle has a right angle, but no sides are equal.

Answer:

The triangle is a right scalene triangle.

Step-by-step explanation:

If any angle is marked by a little square like in the triangle's bottom left corner, that means the angle is 90° or a right angle. Since none of the angles in the triangle are equivalent, that means the right triangle is a scalene triangle. So the correct choice is a right scalene triangle.

Find ​(a) PQ to the nearest tenth and ​(b) the coordinates of the midpoint of __ pq.

Answers

Answer:

a) 5units

b) (4.5, 4)

Step-by-step explanation:

Let the coordinate of P and Q be P(3, 2) and Q(6, 6)

PQ can be gotten using the distance formula;

PQ =√(6-2)²+(6-3)²

PQ = √4²+3²

PQ =√16+9

PQ =√25

PQ = 5units

Midpoint M is  expressed as;

M(X, Y) = {(x1+x2)/2, y1+y2/2}

X = x1+x2/2

X = 3+6/2

X= 9/2

X = 4.5

Similarly;

Y = y1+y2/2

Y = 2+6/2

Y = 8/2

Y = 4

Hence the midpoint of PQ is (4.5, 4)

Note: picture not drawn to scale

The circle above has a radius of 10 cm. What is the area of the circle?

Use = 3.14.
А. 628 cm2
B. 62.8 cm2
C. 314 cm2
D. 31.4 cm?
ASAP

Answers

Answer: C. 314 cm2

Step-by-step explanation:

The equation for the area of a circle is: pi * radius squared. First, 10 squared is 100. 100 times 3.14 is 314.

find y when x=-6 if y =15 when x =-5

Answers

Answer:

y = 18

Step-by-step explanation:

15/-5 = y/-6

cross-multiply:

-5y = -90

y = 18

help help help i’ll kiss u

Answers

Answer:

I, J

Step-by-step explanation:

What is the value of x?

Answers

Answer:

141°

Step-by-step explanation:

The sum of the internal angles can be calculated using the following formula:

(number of sides - 2) x 180°

This polygon has 7 sides, so (7 - 2) x 180° = 900° total internal angle.

Subtract the other given angles from 900°.

(900 - 131 - 122 - 125 - 148 - 107 - 126)° = 141°

Answer:

x equals 141°

Step-by-step explanation:

The sum of interior angles of this figure is 900°. This was found using the formula (n-2) x 180 where 'n' means number of sides. This figure has 7 sides. So the sum of interior angles would be:-

(7 - 2) x 180°

5 x 180°

= 900°

All the given angles + x gives 900°.

So, to find 'x' we can do the following:-

148° + 125° + 122° + 131° + x° + 126° + 107° = 900°

759 + x = 900

x = 900 - 759

x = 141°

Wren makes some rectangular display boxes. Wren’s first display box is 6 inches long, 9 inches wide, and 4 inches high. What is the volume of the display box?

Answers

Answer:

216

Step-by-step explanation:

V = whl =9 · 4 · 6 = 216

y= -x + 4 please help

Answers

Answer:

(0,4)

Step-by-step explanation:

Graph the line using the slope and y-intercept, or two points.

Slope: −1y-intercept: (0,4)xy0413

Five friends are at the movie theater.Each friend has 3/4 of the money needed to buy one bag of popcorn

Answers

Answer:

your question is incomplete but I imagine that your asking how many bags of popcorn they can buy? the answer is 3 or 15/4 depending on what your asking.

Step-by-step explanation:

(3/4)5

15/4

Answer:

3 bags your welcome! :D it's right in khan!

Step-by-step explanation:

Solve for the length of x

Answers

Answer:

[tex]\boxed {\boxed {\sf x\approx 63.7}}[/tex]

Step-by-step explanation:

This is a right triangle. We know this because there is a small square in the corner representing a 90 degree/right angle. Therefore, we can use the right triangle trigonometry ratios.

sinθ= opposite/hypotensue cosθ= adjacent/hypotenuse tanθ= opposite/adjacent

We are given angle A which measures 37 degrees.

Side BC which measures 48 is opposite angle A and the unknown side, x, is next to or adjacent to angle A.

We should use tangent.

[tex]tan \theta= \frac{opposite}{adjacent}}[/tex]

[tex]tan37= \frac {48}{x}[/tex]

Since we are solving for x, we must isolate the variable. First, cross multiply. Multiply the first numerator and the second denominator, then the first denominator and second numerator.

[tex]\frac {tan37}{1}=\frac {48}{x}[/tex]

[tex]tan37*x=48*1[/tex]

[tex]tan37*x= 48[/tex]

x is being multiplied by the tangent of 37. The inverse of multiplication is division, so we divide both sides by the tangent of 37.

[tex]\frac {tan37 *x}{tan37}=\frac{48}{tan37}[/tex]

[tex]x= \frac{48}{0.7535540501}}[/tex]

[tex]x=63.69815144[/tex]

Even though it is not specified, let's round to the nearest tenths place. The 9 in the hundredth place tells us to round the 6 up to a 7.

[tex]x\approx 63.7[/tex]

The unknown side is approximately 63.7 units long.

I WILL GIVE BRAINLIEST!!!!!

Rect. Prism = 2(lw) + 2(wh) + 2(1h)
SA Cube = 6s 2 squared
Which has more surface area, a cube that is 10 in wide, or a rectangular prism that is 12 in wide, 10 in long, and 8 in tall?

Answers

Answer:

Volume is the amount of 3-dimensional space an object occupies. Volume is measured in cubic units.

For example, the rectangular prism below has a volume of 181818 cubic units because it is made up of 181818 unit cubes. also the rectangle has more suface

area Step-by-step explanation:

The net of a three-dimensional figure is made of 6 rectangles that may or may not be squares. Depending on the
number of rectangles that are squares, which could be the figure? Select three options.
O a cube
a square prism
a square pyramid
O a rectangular prism
a rectangular pyramid

Answers

Answer:

A. a cube

B. a square prism

C. a rectangular prism

Step-by-step explanation:

The net of a given shape is the description of  its three dimensional surfaces  in two dimensional plane. From the given question, the 6 rectangular net of the shape has a condition that: the 6 rectangles may or may not be squares. Thus, the figure could be;

i. a cube

ii. a square

iii. a rectangular prism

The three options above have surfaces that could either be squares or rectangles.

Please help me with this math problem

Answers

Answer:

80.6 m

Step-by-step explanation:

Coordinates of the points P and Q are (0, 0) and (40, 70) respectively.

Length of the shortcut can be found by using distance formula between two points P and Q.

Length of the shortcut

[tex] = \sqrt{ {(40 - 0)}^{2} + {(70 - 0)}^{2} } \\ \\ = \sqrt{ {40}^{2} + {70}^{2} } \\ \\ = \sqrt{1600 + 4900} \\ \\ = \sqrt{6500} \\ \\ = 80.6225775 \\ \\ \approx \: 80.6 \: m[/tex]

Manny walked around basketball court. The courtis 27m long and 17 m wide. What is perimeter of court

Answers

Answer:

The perimeter of the court is 88 m

Step-by-step explanation:

To find the perimeter:  (27 x 2)+(17 x 2)     length*2 + width*2

Hope this helps :)

PLZ HELP 50 POINTS Which is the function represented by the table?

A 2-column table with 4 rows. Column 1 is labeled x with entries negative 1, 0, 1, 2. Column 2 is labeled f (x) with entries 4, 5, 6, 7.

Answers

Answer:

the answer is a f(x)= x+5.

Step-by-step explanation:

the answer is f(x)= x+5 because in each row the value increases by 5.

Answer:

a

Step-by-step explanation:

Find the value of x in the triangle shown below.
ac
5

Answers

the value of x is equal to 3

27 miles per gallon 432 miles takes how many gallons

Answers

Answer:

16

Step-by-step explanation:

432/27=16

What is the vertex of the graph of
y = x + 12 -10?

Answers

Answer:

y=x+12-10

Step-by-step explanation:

0=x+12-10

-x=2

x=-2

SOLVE FOR X PLEASEE HELP​

Answers

To solve this, you will have to set up your equation as fractions:

X is to 4 as 4 is to 4+3, or 7

X/4 = 4/7

You will then cross multiply

7x = 4•4
7x = 16

Divide.

X = 2.285714...

Round to the nearest hundredth.

2.29

NEED HELP ASAP TAKING TEST-On average, a person’s body temperature should be approximately 98.6°F. A doctor would like to test the hypotheses H Subscript 0 Baseline: mu = 98.6 versus H Subscript alpha Baseline: mu not-equals98.6 where μ = the true mean body temperature of all adults. Before conducting the test, the doctor determines that the power of the test to reject the null hypothesis when μ = 98 using α = 0.01 and n = 10 is 0.2474. What combination of sample size and significance level would increase the power of this test the most?

use n = 5, alpha = 0.05
use n = 5, alpha = 0.10
use n = 20, alpha = 0.05
use n = 20, alpha = 0.10

Answers

Answer:

D I think,

Step-by-step explanation:

Q7. What would be the best next step in solving the following equation for x?

8x - 4 = 10

Answers

Answer:

The next step would be adding -4 to the other side since it would cancel out -4

Step-by-step explanation:

Help! Solve for the value of x.

Answers

Answer:

x=6 degrees

Step-by-step explanation:

I know that 31+(10x-1)=90. Then I have to subtract 31 from 90 to get 10x -1.

That's 59. I solve for x in the equation 59=10x-1.

That is the same thing as 60=10x, which is also the same as 6=x.

Can someone explain me how to solve this?

Answers

Answer:

X=12

Step-by-step explanation:

since it is an isosceles triangle opposite sides are congruent which means 7x+24=13x-48 you then would need to subtract either the whole numbers or the variables from each side so add 48 on each side it equals to 7x+72=13x then subtract 7x from 13x and you get 72=6x divide both sides 6/6=x, 72/6 Therefore x=12 HOPE that helped mark me brainiest pls

Answer: x = 12

Step-by-step explanation:

There are two triangles. The two vertical lines on the legs at the top indicate that those two sides are congruent or equal to each other. The line down the middle with the right angle box shows that the two triangles share a common side. This would show the two triangles are congruent through Side/Angle/Side. This would indicate that the two sides with equations are equal to each other. That being said, you can setup the equations to equal one another to solve for x:

[tex]7x + 24 = 13x - 48[/tex]

Now, you would just solve this like a normal equation. I would subtract the 7x from both sides a well as add the 48 to both sides. This would result to: [tex]72 = 6x[/tex]

Dividing both sides by 6 would get you:

[tex]x = 12[/tex]

Other Questions
Laura answers her emails while listening to a recording of a training session. Which aspect of cultural context does Lauras behavior demonstrate?A. collectivismB. polychronic timeC. indirect communicationD. high power distanceE. monochronic time Some students were asked to pick their favourite Action Hero.3/5 chose Batman, 20% chose Hulk and the rest chose Iron Man..Write the ratio of Batman: Hulk: Iron Man in Simplest form.Select one:a. 6:2:2b. 60: 20:20 c. 3:1:1 manda swims 40 meters per minute. She uses the inequality below to calculate how many minutes, m, it takes her to swim at least 1,500 meters. 40m1,500Which set of numbers makes the inequality true?A. {24,25,37.5}B. {25,28.5,37}C. {37,39,40.5}D. {37.5,42,43.5} PLEASE HELP THIS IS TIMED!!!! PLEASE HELP!!!! I WILL MARK YOU BRAINIEST TO WHOEVER ANSWERS THIS CORRECTLY!!!! NO LINKS OR I WILL REPORT YOU!!!!!!!!! MY COUSIN IS A LAWYER AND MY DAD IS A COP!!!!!!!!! SO NO LINKS!!!!!!!! I WILL MARK YOU BRAINIEST TO WHOEVER ANSWERS THIS CORRECTLY!!!! R and S represent positive integers on a number line and R Select the correct answer. Consider functions fandg f(3) = 5.2.1, for 3 + 2 and = + -6 4:2 16: + 16 96) = 4+ 48, for : * -12 Which expression is equal to 10) (+? OA . OB. 1 . OD. 5+2 6 Can someone help me on this Find the first three iterates of the function f(z) = 2z + (3 - 2i) with an initial value of zo = 4.a. 13+ 4i, 28 + 9i, 59+ 20ic. 11 + 2i, 25 + 6i, 53 + 14ib. 13 - 4i, 28 - 9i, 59 - 20id. 11 - 2i, 25 - 6i, 53 - 14i A condition that occurs when pathogens get inside the body and damage body cells A. hygiene b. fungi c. infection in this image if the ground were removed from the neutral wire what would the voltage to ground be? If the radius of a cylinder is 3 centimeters, then the area of one of the circular bases is 18.84 square centimeters. True False Henry is fishing from a small boat. His fishing hook is in the water 8 meters directly below his boat. A fish is swimming at the same depth as the hook, however it is 15 meters away from the hook. What is the shortest distance between Henry and the fish? Fill in the missing values. Hey does anyone please can help me with this Suppose that you are an emancipated slave in the South at the end of the Civil War. What changes do you hope for in your new life? Write about three ways you imagine your life will change now that you have your freedom. (ill be checking for plagiarism ) An event that causes changes to the living or nonliving parts of an ecosystem is called a ________________? successiondisturbancespeciesnone of the above Type the missing number that makes these fractions equal:?/84=18/28 The Sun emits radiation with a wide range of wavelengths that cover the entire electromagnetic spectrum. Which of the following is true about this spectrum and the human eye? A point in the figure is selected at random. Find the probability that the point will be in the shaded region PLSS HELPPPPP!!!!!!!Why did the broadcast of the radio play for War of the Worlds creat problems?A. It did not include any musicB. People mistook it for a newscastC. The material offended many people at the timeD. There were several similar radio plays at the time