Solve the problem.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 70 feet and 
walls requires 
of paint, find the amount of paint needed to cover the walls of a room with a perimeter of 60 feet and 10-foot walls.
A. 60 quarts
B. 600 quarts
C. 6 quarts
D. 12 quarts
Answer: C
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Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.A flat rectangular piece of aluminum has a perimeter of 64 inches. The length is 16 inches longer than the width. Find the width.
A. 8 in. B. 32 in. C. 40 in. D. 24 in.
Answer the question.If y = sin ?, what is cot ? in terms of y?
A. cot ? = 
B. cot ? = 
C. cot ? = 
D. cot ? = 
First, create a scatter plot for the data in the table. Then, use the shape of the scatter plot given to determine if the data are best modeled by a linear function, an exponential function, a logarithmic function, or a quadratic function.
A. 
quadratic function
B. 
exponential function
C. 
linear function
D. 
logarithmic function
State the domain and range of the one-to-one functions f and f-1.f(x) = -8x + 5
A. f(x): domain (-8, ?), range (-?, ?); f-1(x): domain (-?,-8), range (-?, ?) B. f(x): domain (-?, ?), range (-?, 5); f-1(x): domain (-?, ?), range (5, ?) C. f(x): domain (-8, ?), range (5, ?); f-1(x): domain (-?,-8), range (-?, 5) D. f(x): domain (-?, ?), range (-?, ?); f-1(x): domain (-?, ?), range (-?, ?)