3less than a product of two numbers

Tan198=asin164=? how to solve this? ?

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.

Akindergarten class has 9 girls and 11 boys in class.what percent of the class are girlsit rain