Seven pipes empty a water tank in five days. In how many days would four pipes empty this tank? Give your answer in days and hours.

7:5 equals 1.4, so we need to multiply 1.4 and 4 and we get 5.6. The answer is 5.6

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!