What is the true statement about absolute value?

How many zeros does the function f(x)=4x3-x2+1 have

What percent of the circle below is shaded?

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?