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 60 feet and 
walls requires 
of paint, find the amount of paint needed to cover the walls of a room with a perimeter of 45 feet and 10-foot walls.
A. 450 quarts
B. 9 quarts
C. 45 quarts
D. 4.5 quarts
Answer: D
Mathematics
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Find the probability.One digit from the number 7,939,449 is written on each of seven cards. What is the probability of drawing a card that shows 7 or 4?
A. 
B. 
C. 1
D. 
Mathematics
Graph y = f(x) and y = |f(x)| in the standard viewing rectangle. Determine the x-intercept for the graph of y = |f(x)|.y = 2x
A. 
x-intercept is 0.
B. 
x-intercept is 0.
C. 
x-intercept is 0.
D. 
x-intercept is 0.
Mathematics
Perform the indicated operation. Write the answer in scientific notation.(2 × 108)(7 × 108)
A. 14 × 1064 B. 1.4 × 1016 C. 1.4 × 1017 D. 14 × 1017
Mathematics
For the simple harmonic motion described by the trigonometric function, find the frequency per second.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics