Solve the variation problem.The gravitational attraction between two masses varies inversely as the square of the distance between them. If the force of attraction is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
A. 1 pound
B. 3 pounds
C. 2 pounds
D. 4 pounds
Answer: A
Mathematics
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Find the reciprocal of the number.-8
A. 8
B. 0
C. 
D. - 
Mathematics
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Tran's subtotal at Scramble's Electronics is $344.83. The sales tax on these items is $20.38. What was Tran's total bill?
A. Estimate: $280; exact: $324.45 B. Estimate: $300; exact: $365.21 C. Estimate: $320; exact: $365.21 D. Estimate: $365.21; exact: $365.21
Mathematics
Add or subtract. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Identify and graph the polar equation.r = 2 + 2 sin ? 
A. 
cardioid
B. 
cardioid
C. 
cardioid
D. 
cardioid
Mathematics