The sales tax rate in Fort Worth, Texas, is 8.25%. Find the tax charged on a The tax charged on the $28.24 purchase is $. purchase of $28.24. (Simplify your answer. Type an integer or a decimal. Round to the nearest cent if needed.)Using the formula for simple interest and the given values, find I. P = $400; r= 8%; t = 4 years; I = ?Use the formula for simple interest, I = Prt, to find the indicated quantity. 1 = $21; r= 6%; t= 3 months; P = ? P = S (Type an integer or a decimal.)Determine the present value P you must invest to have the future value A at simple interest rate r after time t. A = $5000.00, r = 9.5%, t = 39 weeks (Round to the nearest cent.)The principal P is borrowed and the loan's future value A at time t is given. Determine the loan's simple interest rate r to the nearest tenth of a percent. P = $4200.00, A = $4420.50, t = 9 months % (Round to the nearest tenth of a percent.)Using the interest formula A = P(1 + it), solve for the indicated variable. Solve for P. P =A loan of $23,444 was repaid at the end of 6 months. What size repayment check (principal and interest) was written, if a 9.2% annual rate of interest was charged? The amount of the repayment check was $ (Round to two decimal places.)