Solve.The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose the the intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 10 miles? Round your answer to the nearest unit.
A. 320 units
B. 284 units
C. 303 units
D. 346 units
Answer: A
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Solve the problem.A balloon used in surgical procedures is cylindrical in shape. As it expands outward, assume that the length remains a constant 
. Find the rate of change of surface area with respect to radius when the radius is 
(Answer can be left in terms of ?).
A. 60.32? mm2/mm B. 120.0? mm2/mm C. 120.32? mm2/mm D. 60.16? mm2/mm
Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m B. 21 + m C. 21 + 7m D. 21 + 3m
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(
+ 
)(
- 
)
A. 12 - 2
B. 12z
C. 12 - 2
D. 12 - z
Simplify the radical expression. Assume that variables represent positive numbers.
A. 
B. 
C. 
D. 