Answer:
Sarah has to invest $502,958.58 today.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:
In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:
In this question:

She has to invest P today.

So



Sarah has to invest $502,958.58 today.
Answer:
The T shirt choice
Step-by-step explanation:
Both values increase at the same rate therefore is proportional.
Answer:
1. x - 1
2. 
Step-by-step explanation:


Unlike terms displays terms which are not the same. x+2y would be the answer.