Suppose the position of an object moving in a straight line is given by s(t) = t3 - t2 + 7. Find the instantaneous velocity when t= 8. c:> The instantaneous velocity is D at t = 8. (Simplify your answer.) The total profit P(x) (in thousands of dollars) from the sale of x hundred thousand pillows is approximated by P(x)= x3 +15x2 +72x300, x25. Find the number of hundred thousands of pillows that must be sold to maximize prot. Find the maximum profit. The maximum prot is $D. The maximum prot will occur when E pillows are sold