A one-year membership to a swim club is $170. This cost includes a $20 registration fee and 12 monthly payments. The equation 12m+20=170 can be used to find the amount m of each monthly payment. Solve the equation and interpret the solution.

(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 ?

Which number completes the inequality? 2/3 < _ < 7/9

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?