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

Mathematics

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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

Mathematics

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

Mathematics

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

Mathematics

Solve the rational equation. =  + 1

A. ? B. {0} C. {x|x ? 1} D. {1}

Mathematics