Estimate the sum as indicated. Then answer the question.Estimate the following sum by first rounding to the nearest hundred. Does the estimate give you reason to doubt the stated sum?
A. Estimate: 52,600 ; no
B. Estimate: 52,500 ; yes
C. Estimate: 52,600 ; yes
D. Estimate: 52,500 ; no
Answer: D
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Find an equation for the hyperbola described.Focus at (3, 6); vertices at (8, 6) and (6, 6)
A. (x - 6)2 - 
= 1
B. 
- (y - 6)2 = 1
C. 
- (y - 7)2 = 1
D. (x - 7)2 - 
= 1
Solve the problem.A grain silo has the shape of a right circular cylinder with a half sphere on top. It is used to store various grains (corn, wheat, etc.) sold and delivered to market. The surface area, in square feet, of a grain silo of height h and radius r, both in feet and including the area of the base, is given by the polynomial 
. How much surface area does a silo have if it has a radius of 25 ft and a height of 60 ft? Use 3.14 for ? and round to the nearest tenth of a square foot.
A. 9498.5 ft2 B. 9420.0 ft2 C. 6672.5 ft2 D. 11,382.5 ft2
Multiply to find the exact answer. Express the answer as a whole or mixed number when possible and simplify.2
? 23
A. 61
B. 60
C. 51
D. 46
Simplify the expression.-2x - 3(x + 5y)
A. -3x - 15y B. -5x - 15y C. -5x + 5y D. -5x + 15y