7. Richard deposited $5400 and got back an amount of $6000 after 2 years. Find Richard's interest rate.

Which formula gives the area of a triangle? a=1/2(b+h)

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

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.