0.7 repeating decimals as a fraction

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.

What is the number 321,000,000 in scientific notation? also what is the number? ?

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points