Solve the problem.If the height of a rectangular solid is held constant, the volume varies jointly with the length and the width. If the volume is 120 cubic inches when the length is 8 inches and the width is 3 inches, find the volume when the length is 7 inches and the width is 4 inches.
A. 160 in.3
B. 112 in.3
C. 105 in.3
D. 140 in.3
Answer: D
Mathematics
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Complete the square for the binomial. Then factor the resulting perfect square trinomial.x2 + 7x
A. x2 + 7x + 14 = (x + 7)2
B. x2 + 7x + 
= 
2
C. x2 + 7x - 
= 
2
D. x2 + 7x + 
= 
2
Mathematics
Determine the period of the given function.y = 3 cos x
A. ?
B. 3
C. 2?
D. 
Mathematics
Evaluate.
A. 5,100,480 B. 255,024 C. 6.20 × 1023 D. 12,144
Mathematics
Solve the equation.
+ 3 = 6
A. {81} B. ? C. {33} D. {9}
Mathematics