How do you do this could you explain on how you do it and also give me the answer lol

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Find two numbers if their sum is 91 and the ratio is 6: 7?