Maria earned $126 in simple interest from her savings account. If she invested $450 for 7 years, what was the interest rate? 4%

4.5%

3.5%

5%

The diameter of a bacteria colony that doubles every hour is represented by the graph below. what is the diameter of the bacteria after 8 hours? graph of a curve passing through the points zero comma 1, one comma two, two comma four, and three comma eight