Solve.The number of pets (measured in thousands) living in Springfield homes can be approximated by the equation N(x) = 0.16x2 - 0.23x + 158.5, where x is the number of years after 1990. Find 
A. N(9) = 171,230
B. N(9) = 1596.43
C. N(9) = 169,390
D. N(9) = 10,890
Answer: C
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Find the area enclosed by the given curves.y = x, y = x2
A. 
B. 
C. 
D. 
Solve the problem.A rectangular box with volume 345 cubic feet is built with a square base and top. The cost is $1.50 per square foot for the top and the bottom and $2.00 per square foot for the sides. Let x represent the length of a side of the base. Express the cost of the box as a function of x. Give the function and state its domain.
A. C(x) = 3x2 + 
Domain: {x| x > 0}
B. C(x) = 4x + 
Domain: {x| x > 0}
C. C(x) = 3x2 + 
Domain: {x| x > 4}
D. C(x) = 2x2 + 
Domain: {x| x < 10}
Solve the problem.Claire received scores of 85, 88, 87, and 75 on her algebra tests. What score must she receive on the fifth test to have an overall test score average of at least 83?
A. at most 80 B. at most 81 C. at least 80 D. at least 81
Supply the missing numbers. 
A. 
0.4
B. 
4
C. 
4
D. 
0.4