Use quadratic regression to model the following data. Round your answers to two decimal places, if necessary.
?
x 0 10 12 23 31 y 4 12 18 11 3?
A. ?
B. ?
C. ?
D. 
Answer: D
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Solve the problem.A rectangular horse pen is to be fenced and divided into five partitions as shown. The length of the fenced-in area is to be twice the width, and the total amount of fencing to be used is 290 feet. Find the length and width of the fenced-in area.
A. length = 64.4 feet, width = 32.2 feet B. length = 24.1 feet, width = 12 feet C. length = 58 feet, width = 29 feet D. length = 31 feet, width = 29 feet
Match the equation with its graph.y = 2x
A. 
B. 
C. 
D. 
Solve the problem. Use ? ? 3.14 when necessary.Find the volume of a triangular pyramid with base area 22 ft2 and height 8 ft. Find the result to the nearest unit.
A. 59 ft3 B. 57 ft3 C. 176 ft3 D. 88 ft3
Simplify. Assume that all variables represent positive numbers.
A. 400xy12 B. 625x16y48 C. 5x4y12 D. 12.5x4y12