Algebra 2, need with these and some others

Five different problems in one post?  That's a turn-off for some potential helpers.  Suggest you post only ONE problem at a time.

In regard to the first problem:  Your Principal (P) is $8000.  The Interest Rate (i) is 19%.  The elapsed time is 7 years.  Using the formula for continuous compounding:

A = P e^(rt), where "e" is the very common base with value approx. 2.718.

Here,   the amount due is A = $8000 * e^(0.19 * 7).  Can you evaluate this?