Aballoon is 30 yards above the ground. it starts to float upwards, and the altitude increases at a rate of 5 yards per minute. enter the altitude, in yards, of the balloon after 20 minutes.

(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 ?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply