Can someone show me how to do a log with no base

Seattle, washington is known for being rainy. one day last month, 8 inches of rain fell in 1 1/2 hours. what us the rate of the rainfall expressed in ft per plzzz write a proportion i will give you 100 points

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

Yvaries directly as x. y =90 when x=6. find y when x=13