12 is 90% of what number? Find the number round to the nearest 10th. pls help

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

The equation line of cd is y=-2x-2. write an equation of a line parallels to line cd in slope-intercept form that contains point (4,5)

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation