Geometry, please answer question ASAP

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog