The red se is widening at a rate of 1.25 centimeters per year. how many years will it take to widen another 812.5 centimeters

15 points ! ~ see if you know the answer to both you!

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 slope of the line that contains the points (-2,1) and (0,-3)