Juana’s dad gave her an exponentially increasing allowance as an experiment. on the first day, he gave her 1¢. on the second day he doubled it and gave her 2¢, and on the third day, he doubled that and gave her 4¢. he kept doubling the previous day’s amount for a total of 10 days. how much did he give her on the tenth day? 18¢

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315