What is the value of square root of 25 ?

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

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.

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?