The mean salary per month of the teachers at Bright School is $4500 and the standard deviation is $350. The Board of governors decide to increase the salary of all the teachers by 10%. Find the new
mean and standard deviation.

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.