Solve the problem.The grading scale for a C in Amy's biology class is an average on tests between 70% and 80%, inclusive. Amy has 66%, 83%, and 75% on the first three tests this semester. What range of scores on the fourth test would give her a C?
A. Between 70% and 80%, inclusive
B. Between 61% and 91%, inclusive
C. 91% or better
D. Between 56% and 96%, inclusive
Answer: D
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Solve the problem.A farmer's silo is the shape of a cylinder with a hemisphere as the roof. If the radius of the hemisphere is 10 feet and the height of the silo is h feet, express the volume of the silo as a function of h.
A. V(h) = 100 ?(h2 - 10) + 
?
B. V(h) = 4100 ?(h - 10) + 
?
C. V(h) = 100 ?(h - 10) + 
?
D. V(h) = 100 ?h + 
?h2
Find the volume. Use ? ? 3.14. Round to the nearest tenth when necessary.a cylinder with radius 7 in. and height 20 in.
A. 439.6 in.3 B. 12,308.8 in.3 C. 879.2 in.3 D. 3077.2 in.3
Find the area of the triangle. Approximate values to the nearest tenth when appropriate.base = 32.5 in., height = 20 in.
A. 200 in.2 B. 240 in.2 C. 325 in.2 D. 650 in.2
Solve the rational equation.
= 
+ 1
A. ? B. {0} C. {x|x ? 1} D. {1}