15% of the apples in a crate are rotten. there are 12 rotten apples in the crate. how many apples are in the crate?
, i don't need the answer just the to solve it

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

The value √10 and √15 are plotted on the number line

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)