Find the value of k for which the distance between (9, 2) and (3, k ) is 10 units.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?