#18-7: find the radius of a circle that has an area of 4.5216 cm^2. use 3.14 for pi.

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 percent of the circle below is shaded?

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers?