The swan family installs an above-ground pool. the circular pool covers about 78. 5 square feet of lawn in the backyard. what is the length, in feet, of the edge of the pool? use pi equals 3.14.

(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 ?

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25