5 workers together can build a road in 20 days. Suppose every worker works at the same rate. If 3 workers work on the road for 10 days before 11 more workers join them, then how long total will it take to build the road?

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)