Two bugs are running back and forth along a straight branch at constant speeds without stopping. they start from opposite ends of the branch at the same time and meet for the first time 40cm from one end of the branch. they continue to the ends and return, meeting for the second time 20 cm from the other end of the branch. how long is the branch?

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.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15