19.2 x - 15 = 7.5+ 8.4

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.

Which statement best explains why ben uses the width hi to create the arc at j from point k

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?