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Find the time required for an investment of 5000 dollars to grow to 6400 dollars at an interest rate of 7.5 percent per year, compounded quarterly. Your answer is t= years.Twice the sum of a number and 7.Francesca opened a savings account and deposited 600.00 as principal. The account earns 15% interest, compounded annually. How much interest will she earn after 4 years?joseph and david are playing with cards and in a pack there are 52 cards joseph drew a card at random with a replacement then he ask david what is the probability of drawing a queen followed by a kingNancy earned some money doing odd jobs last summer and put it in a savings account that earns 14% interest compounded annually. After 10 years, there is 300.00 in the account. How much did Nancy earn doing odd jobs?Round your answer to the nearest cent.