Solve.The amount of paint needed to cover the walls of a room varies jointly as the perimeter of the room and the height of the wall. If a room with a perimeter of 35 feet and 
walls requires 
of paint, find the amount of paint needed to cover the walls of a room with a perimeter of 40 feet and 10-foot walls.
A. 400 quarts
B. 8 quarts
C. 4 quarts
D. 40 quarts
Answer: C
Mathematics
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Write a chain rule formula for the following derivative.
for z = f(r, s); r = g(t), s = h(t)
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
D. 
= 
+ 
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Perform the division. Write the answer with positive exponents.
A. 8x + 6
B. 5x + 6
C. 5x + 6 + 
D. 5x - 48x5 + 
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Simplify.
A. - 
B. - 
C. 
D. 
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Write the percent problem as a proportion and solve.67 is 134% of what number?
A. 50 B. 17,956 C. 500 D. 179.56
Mathematics