Summer's April credit card statement has just arrived. It shows a balance of $581.28. Suppose she makes a payment of $106.19 and purchases of $219.66. Find the finance charge if the monthly interest rate is 1.9% of the unpaid balance. Finance Charge: $ What is the new balance on May 1? New Balance: $ Question Help: Message instructor Add Work = . A radioactive isotope decays according to the function A = Ao 2-0.59t, where Ao is the original amount and A is the amount t years after the substance began decaying. If there are 392 grams of this substance initially, how much remains after 6 years? Round your answer to the nearest tenth. g How many years would it take to decay to 31% of the original amount? Round to the nearest tenth of a year. years Question Help: Message instructor Add Work