Pennslyvania has approximately 1.28×107 people living in it. The population of the entire United States has approximately 3.28×108
people. About how many times greater is the population of the United States than the population of Pennslyvania. (write your answer in standard form)

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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%