Find the circumference and area of a circle having the given diameter or radius. Use 3.14 for ?. Round your results to the nearest tenth.r = 12.5 mi
A. C ? 39.3 mi, A ? 1962.5 mi2
B. C ? 78.5 mi, A ? 78.5 mi2
C. C ? 39.3 mi, A ? 157 mi2
D. C ? 78.5 mi, A ? 490.6 mi2
Answer: D
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Estimate the square root of the following number, n, by finding a natural number a such that a < 
< a + 1.334
A. 18 B. 324 C. 361 D. 19
Graph the inequality.2x + 5y > -10
A. 
B. 
C. 
D. 
If f is one-to-one, find an equation for its inverse.f(x) = x3 + 8
A. f-1(x) = 
B. f-1(x) = 
- 8
C. Not a one-to-one function
D. f-1(x) = 
Use a graphing calculator to plot the data and find the quadratic function of best fit.The following table shows the median number of hours of leisure time that Americans had each week in various years.
Use x = 0 to represent the year 1973. Using a graphing utility, determine the quadratic regression equation for the data given. What year corresponds to the time when Americans had the least time to spend on leisure?
What will be an ideal response?