The expected lifetime of the deluxe model hair dryer produced by Roland Electric has a mean life of 21 mo and a standard deviation of 3 mo. Find the probability that one of these hair dryers will last between 17 and 25 mo.
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Solve the problem.The percent p of high school students who participate in sports at a public high school can be modeled by 10p - 16x = 224,where x is the number of years after 2010. Interpret the slope as a rate of change if x is the independent variable.
A. The percent of high school students who participate in sports at this school is decreasing by 1.6 percent per year. B. The percent of high school students who participate in sports at this school is increasing by 16 percent per year. C. The percent of high school students who participate in sports at this school is decreasing by 16 percent per year. D. The percent of high school students who participate in sports at this school is increasing by 1.6 percent per year.
Use graphical methods to find all real solutions to the following equation. Express solutions rounded to the nearest hundredth.- 
x3 + 
x2 + 
= 0
A. {-0.52, 0.77, 1.60} B. {-2.00} C. {-1.60, -0.77, 0.52} D. {2.00}
Factor the sum or difference of two cubes.27p3 - 1
A. (27p - 1)(p2 + 3p + 1) B. (3p - 1)(9p2 + 1) C. (3p + 1)(9p2 - 3p + 1) D. (3p - 1)(9p2 + 3p + 1)
Find the derivative of the function and evaluate the derivative at the given x-value.f(x) = 1 - x3 at x = 1
A. f'(x) = 1 - 3x; f'(1) = -2 B. f'(x) = -3x2; f'(1) = -3 C. f'(x) = 3x2 - 1; f'(1) = 2 D. f'(x) = -3x; f'(1) = -3