The length of the rope was cut from 30 inches to 24 inches. By what percent was the price of the rope reduced?

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.

Solve -2(4y + 6) = 52. 5 -5 8 -8 and !

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?