Solve the problem.If 4 hours are required to type 12 pages, how many hours would be required to type 21 pages?

A. 3 hr
B. 7 hr
C. 8 hr
D. 2 hr


Answer: B

Mathematics

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Find the length of the curve.x = cos 2t, y = sin 2t, 0 ? t ? 2?

A. 6? B. 2? C. ? D. 4?

Mathematics

The following table shows the number A , in millions, of traffic accidents t years after 2004.  t 0 1 3 4  E 10.92 10.75 10.65 10.24? ? A: Find the equation of the regression line.B: Plot the data along with the regression line.C: Explain in practical terms the meaning of the slope of the regression equation.D: What number of accidents does the regression line predict for 2009?

What will be an ideal response?

Mathematics

Solve.How long will it take for the population of a certain country to double if its annual growth rate is 0.6%? Round to the nearest year. Use the exponential growth model 

A. 116 yr B. 50 yr C. 333 yr D. 1 yr

Mathematics

Decide whether the limit exists. If it exists, find its value.lim f(x)x?0

A. -1 B. -2 C. 0 D. Does not exist

Mathematics