State the numerical digits that define how long you have here and enjoy my points

What is the measure of ac? 5 units 13 units 26 units 39 units

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%