Answer:
-2
Step-by-step explanation:
The sign would be negative because the pounds were lost not gained
The Richter scale magnitude reading m is given by m=log10x , where x represents the amplitude of the seismic wave causing ground motion. Determine the reading of an earthquake that is 10 times less intense than an earthquake that measures 4.5 on the Richter scale.
Answer: The reading would be 5.5 on the Richter scale.
Step-by-step explanation:
The intensity of an earthquake that measures 4.5 on the Ritcher scale can be found by solving:
4.5 = log₁₀(x)
for x.
remember that:
logₐ(x) = ln(x)/ln(a)
Then we can rewrite our equation as:
4.5 = ln(x)/ln(10)
4.5*ln(10) = ln(x)
we also know that:
ln(exp(x)) = exp(ln(x)) = x
Then we can apply the exponential equation to both sides to get:
exp( 4.5*ln(10)) = exp( ln(x) ) = x
exp( 4.5*ln(10)) = x
x = 31,622.8
Now, if we have an intensity 10 times larger than this, we will have:
x = 10*31,622.8 = 316,228
The reading on the Richter scale will be:
m = Log₁₀(316,228) = 5.5
Plsssssssssssssss help
Answer:
B
Step-by-step explanation:
If y varies directly as x, and y =-4 when x=8, find y when x=3
Answer: Another way of looking at it!
y
=
10
Explanation:
This is a ratio question in disguise.
By parts of the question:
"When y varies directly with x"
→
y
x
"
"if y=8 when x=4"
→
.
.
y
x
=
8
4
"how do you find y when x=5"
→
y
x
=
8
4
=
y
5
so
y
=
8
×
5
4
=
10
This is the same thing as using 'k' in the other solution
Step-by-step explanation:
Peter works two part time jobs. He is paid $6 er hour at job a and $9 per hour at job b. Last wee eter worked a total of 24 hours at both jobs and madr $189. Hobmny hours dud peter work at job a?
Answer: Peter worked 9 hours at job a
Step-by-step explanation:
Step 1
Let the number of hours worked in job a = x
and number of hours worked in job b = y such that the total hours worked would be expressed as
x=y= 24 ---eqn 1
also since $6 and $9 dollar are paid per hour for the job and the total amount made is $189, it should be expressed as
6x + 9y =$189--- equation 2
Step 2
Now we have gotten two expressions to solve for number of hours, we can now solve
x+y= 24 ---eqn 1
6x + 9y =$189--- eqn 2
Using elimination method, we multiply equation 1 by 6 and subtract from equation 2
6x + 9y =189
-6x+6y=144
3y=45
y= 45/3 =15
To find x
x+y = 24
x+15=24
x= 24-15
x= 9
fff
Therefore Peter worked 9 hours at job a and 15 hours at job b
A ladder leans against a building. If the ladder reaches 18 feet up the wall and contacts the ground 5 feet from the building, what is the angle formed between the top of the ladder and the building?
Answer:
I think it is 15 Tan^-1 (5÷18)
A lion's heart beats 6 times in 8 seconds. How many heartbeats will it have in 40 seconds?
Answer:
30 times
Step-by-step explanation
Answer:
30
Step-by-step explanation:
Trista has 7/8 of a yard of ribbon to use for making decorative frames . If you frame used 5/6 of a yard of ribbon , then how much is remaining
Answer:
[tex]\dfrac{1}{24}\ \text{yard}[/tex]
Step-by-step explanation:
Amount of ribbon Trista had is [tex]\dfrac{7}{8}\ \text{yard}[/tex]
Amount of ribbon used in the frame [tex]\dfrac{5}{6}\ \text{yard}[/tex]
Amount of ribbon remaining is
[tex]\dfrac{7}{8}-\dfrac{5}{6}=\dfrac{21-20}{24}[/tex]
[tex]=\dfrac{1}{24}\ \text{yard}[/tex]
The amount of ribbon remaining is [tex]\dfrac{1}{24}\ \text{yard}[/tex].
Which of the following word problems can be solved using the equation 10 x - 15=60
Answer:
Kit buys
Step-by-step explanation:
im right
Carl earned grades of 62 78 59 and 89 on four math tests what is the mean if his grades
Answer:
The answer is 72
Step by step Explanation:
You add 62 + 78 + 59 + 89
And it equals 288
Then divide that answer by 4
And the answer is 72
WILL GIVE BRAINLIEST AND 50 POINTS
what is the reactants and products of Fe2O3+3CO→2Fe+3CO2
Step-by-step explanation:
The compounds that are found on the left of a chemical reaction (the side with the arrow's tail) are the reactants. Therefore our reactants are Iron(III) oxide and Carbon monoxide.
The compounds found on the right-hand side of a chemical reaction/after the arrow are the products. Therefore our products are Iron and Carbon dioxide.
Answer:
[tex]\large \boxed{\sf Reactants \rightarrow Fe_2O_3, \ CO}[/tex]
[tex]\large \boxed{\sf Products \rightarrow Fe, \ CO_2}[/tex]
Step-by-step explanation:
The substance(s) to the left of the arrow are called reactants
The substance(s) to the right of the arrow are called products
A store offers 30% off all items. If x is the original purchase price, select all of the expressions which represent the final price with the discount.
a 0.7x
b x
c x + 0.3x
d x - 0.3x
e 12x
Answer:
D c
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
not really an explanation
solve for x,y and z in the following diagrams
Step-by-step explanation:
answers in 4 y z missing ......
from my side
which graph models the solution of the Inequality -6 ≤ -3x
We know that graph (B) models the solution of the given inequality -6 ≤ -3x.
What are graphs?Drawing the curve that represents a function on a coordinate plane is known as graphing a function. Every point on the curve will satisfy the function equation if the curve (or graph) represents the function.Line graphs, bar graphs, pie charts, scatter plots, and histograms are examples of common graph types. Graphs are a fantastic tool for displaying statistics and visualizing data. To depict numerical data that is unrelated to one another, a bar graph or chart may be utilized.So, in the given inequality:
-6 ≤ -3xWe know that:
Make x subject: -6/-3 ≤ xWhich is 2 ≤ x, represented in a graph (B).Therefore, we know that graph (B) models the solution of the given inequality -6 ≤ -3x.
Know more about graphs here:
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need help with a question
so....wts the question?
(a) An angle measures 25°. What is the measure of its complement?
(b) An angle measures 91°. What is the measure of its supplement?
Answer:
A) 65 degrees
B) 89 degrees
Step-by-step explanation:
Complementary angles always add up to 90 degrees whereas supplementary angles always add up to 180 degrees
Hope it helps :)
Can someone please help me?:)
i dont know how to do this question can you please explain how to
Answer:
84
Step-by-step explanation:
the perimeter is basically all the way round a shape
P=2l+2d2﹣l2 for the diagnol
Point D has coordinates (4, 1). What are the coordinates of Rx = 2(D)?
Answer:
The coordinates of Rₓ = [tex]2^{(D)}[/tex] = D'(0, 1)
Step-by-step explanation:
As given, D = (4, 1)
Now,
The coordinates of Rₓ = [tex]2^{(D)}[/tex] = D'(0, 1)
Solve the equation
3s-4s=28
Answer:
-28
Step-by-step explanation:
Answer:
s=[tex]\frac{2}{3}[/tex]
Step-by-step explanation:
What is the volume of a right circular cylinder with a radius of 5 cm and a height of 12 cm?
O 60 cm
O 1207 cm
O 300 cm3
O 1200 cm
Answer:
Step-by-step explanation:
Area of base = πr² = 25π sq cm
Volume = πr²h = 300π cu cm
Which polynomial is a quintic trinomial?
A.−x4−5x2+1
B. 3x5+7x2−9x4
C. x3+2x2−8x+16
D. x² + 4
Answer:
D. x^2+4Step-by-step explanation:
I have seen this exact question and this was the answer.
Hope it helps.
i really don’t understand this and i need help so if you can pls help
Answer:
1537500
Step-by-step explanation:
it should be that. all you do is multiply 615000 by 2.5
Answer number 31 and 32. For what value of x is the figure the given parallelogram?
Answer:
cant see 32
Step-by-step explanation:
Dana has to pay 30% tax on any income above £30,000 per year.
Dana is paid £45,000 annually.
Calculate the amount of money she receives after tax each month.
cantidad de cajas cantudad de lapises
Answer:
no lo sé
Step-by-step explanation:
Number of boxes number of pencils?
No hay algo en concreto :'v
what is 488 rounded to the nearest hundred
Answer:
500
Step-by-step explanation:
John is a furniture maker. The graph shows the number of chairs John makes and the time it takes to make that many chairs. How many hours
will it take for John to make 30 chairs?
OA
between 1 and 2 hours
OB.
between 2 and 3 hours
OC. between 3 and 4 hours
OD
between 4 and 5 hours
Answer:
between for and five hours
Step-by-step explanation:
Dawn bought a winter coat at 30% off the original price. The discount on the coat was $21. was the original price of the coat? SHOW WORK
Answer:
$70
Step-by-step explanation:
21/30 = 0.7
100x 0.7 = 70
NEED ANSWERS WILL MAKE BRAINLIEST!
Answer:
1
-4
none
none
6
3
min
2
-5
-2
max
-1
0
-5
none
none
Step-by-step explanation:
f(4) is just asking what the y value is when x=4 which is 1
f(-3) = -4
This has no minimum or maximum because the range is all real numbers (the y value goes to infintiy and negative infinity)
f(3)=6
f(0)= 3
This has a minimum because the lowest y value possible is not infinity (it's 2)
f(1)= -5
f(4)= -2
max= -1
f(-1)= 0
f(6)= -5
none
none
Given the graph of the function F(x) below, what happens to F(x) when x is a
very small positive number?
A. FX) is a very small positive number
B. F(x) is a negative number with a large absolute value
C. F(x) is a very large positive number
D. F(x) is a negative number with a small absolute value
Answer:
B. F(x) is a negative number with a large absolute value.
Step-by-step explanation:
The Y and X axes in this case are asymptotes, it means that the function will never touch them. When x is negative and is so small, the function tends to negative infinity, because the function try to cut it but it will never happen.
In ΔMNO, n = 92 inches, ∠N=119° and ∠O=20°. Find the length of m, to the nearest 10th of an inch.
Answer:
Step-by-step explanation:
The length of the side of the triangle will be 69 inches.
What is the sine law?The Law of Sines The law of trigonometric functions, sine law, sine formula, or sinusoidal rule is a trigonometric equation that relates the sizes of any triangle's edges to the sines of its orientations.
The sine law in the triangle ΔMNO is given as,
n / sin N = m / sin M = o / sin O
The third angle is calculated as,
∠M + ∠N + ∠O = 180°
∠M + 119° + 20° = 180°
∠M = 41°
The length m is calculated as,
n / sin N = m / sin M
92 / sin 119° = m / sin 41°
m = 69 inches
The length of the side of the triangle will be 69 inches.
More about the sine law link is given below.
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