How do you find the derivative of h(t)=sqrt(t)(1-t^2)

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2