What is the area of the trapezoid?

6 on top 8 in middle and 16 on bottum

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

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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?