The profit from a business is described by the function P(x) = -4x^2 +16x +25, where x is the number of items made, in thousands, and P(x) is the profit in dollars. How many items will maximize the profit?

A.) 1000

B.) 2000

C.) 3000

D.) 4000

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?