Use your estimation skills and the percent shortcuts to select the most reasonable answer. Do not write an equation and solve it.Find 80% of 640 basketballs.
A. 560 basketballs
B. 512 basketballs
C. 720 basketballs
D. 80 basketballs
Answer: B
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Determine the area of the surface generated when the curve is revolved about the indicated axis.x = 4y3/2 - 
, for 1 ? y ? 8; about the y-axis
A. 
B. 
C. 
?
D. 
?
Solve the linear equation symbolically.-4 + 10 = 
A. -28 B. -4 C. -20 D. -12
Write the ratio in fraction notation. Express the fraction in simplest form.14 to 11
A. 
B. 
C. 
D. 
Solve.The amount of simple interest earned on an investment over a fixed amount of time is jointly proportional to the principle invested and the interest rate. A principle investment of $1500.00 with an interest rate of 2% earned $150.00 in simple interest. Find the amount of simple interest earned if the principle is $4500.00 and the interest rate is 7%.
A. $157,500.00 B. $525.00 C. $450.00 D. $1575.00