For males in a certain town, the systolic blood pressure is normally distributed with a mean of 110 and a standard deviation of 9. Using the empirical rule, determine the
interval of systolic blood pressures that represent the middle 95 of males.

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.