In January, Mr. Tan's students read 20 books. In February, they read 15 books.
What is the percent increase or decrease in the number of books they read?

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is