4. When a key on piano is pressed, a sound is heard. What produces this sound?
A. the vibrating key of the piano
B.
The Vibrating String Of Piano
C. the finger pressing the piano key
D. the air molecules inside the piano

PART B: Which phrase from paragraph 13 best supports the answer to Part A?A "Nixon had brought a controversial end to the Vietnam War"watched NASA put astronauts on the moon""presided over a healing period in American history in the early 1970s"D."Despite these many accomplishments"B. Drag each tile to the correct box. Amanda, Derrick, and Todd attend the same high school. Each student works as the cashier one night a week at the school's concession stand. The number of items sold at the concession stand to the first 20 customers on three different nights is represented on the dot plots below. Find the interquartile range, IQR, for each dot plot. Then, place the students in order from greatest to least IQR. in your answer in number 4 what was your understand?did you give reason/s on your stand ..im sorry po pangit lng talaga ung sulat ko btw i put brainless if tama po ung sagot Which part of a paragraph that contains a quotation is considered to be the "core" of the paragraph?Group of answer choicesMain IdeaAnalysisTransitionQuotation Consider the geometric sequence 8,4,2,1,... Youre writing a family newsletter to let everyone know whats going on with your family members. Choose five family members and write 4 sentences in French about each person. Describe what is happening in their lives now and/or what has happened in the recent past. Pls help Ill brainlest ASAP Given b=4, c=1, A=120 for a triangle with sides a, b, c and angles A, B, C. What is the area of the triangle? Round to the nearest hundredth. How does scout react to the people in the gallery of the courtroom standing? PLESE HELP WILL GIVE BRAINLYESTYImagine that you are Andreas Vesalius. Write a short autobiographical statement that talks about who you are, where youre from, and some of your important contributions. What is equivalent to 3^-5 Read the sentences.Centerville's Fourth of July parade was a point of civic pride for almost everyone in the town.Although not every person was in the parade itself, most people helped plan and prepare for it.The root word civ means "citizen." Two words that use this root are civil and civilized. What isthe meaning of civic in the sentences?almost like a citizenboastful of citizensplanned for citizensrelating to a citizenDone > Not meeting with preconceivedexpectations can often lead toA. psychological exhaustionB. psychological alarmC. psychological resistanceD. psychological adaptation A nebula is often made up of hydrogen and helium gases.TrueFalse 5. In the regular decagon shown, what is the measure of angle 1? *1 pointOne Exterior Angle of a REGULAR PolygonOneEx 4 = 360(18 degreesO36 degrees72 degrees0180 degrees Seven gallons of a sugar solution was mixed with 4 gallons of a 80 percent sugar solution to make an 72 percent sugar solution. Find the percent concentration of the first solution. (a) 70% (b) 61% (c) 69% (d) 67% Where would you collectdata during anexperiment? Angle RelationshipsUse a calculator to find the approximate value of the expression. Round the answer to two decimal places.The cosine of the complimentary angle to 38a. 0.68b. -0.16c. -0.22d. 0.62Please select the best answer from the choices provided Please help. Determine which lines are parallel and which are perpendicular. Explain your reasoning. A quality control inspector at a clothing manufacturer