if your friends doctor wants her target heart rate to be between 143 and 170,and her average resting heart rate is 62 what is her age?explain your method

Adan has decided to purchase an $9000 car. he plans on putting 20% down toward the purchase and financing the rest at 7.9% interest rate for 3 years. find his monthly payment a) $225.29 b) $298.81 c) $204.78 d) $236.89