Pump 1 can emty a pool in about 8 hours while pump 2 can empty the same pool in 9 hours. If the two pumps worked together how long would it take them to empty the pool?

about 4 hours
about 4 hours and 15 mins
about 4 hours and 30 mins
about 4 hours and 45 mins

the camry sales+accord sale=828,000. to make it so the two numbers are 18 thousand apart and still equal 828,000, you first need to find out what half of 828,000 is. 828,000/2=414,000. for the two numbers to equal 828,000, you have to add the same amount as you subtract from the middle. in this case, the number is 9,000 because it's half of 18,000. to equal 828,000, you have to add 9,000 to 414,000 for the camry and subtract 9,000 from 414,000 for the accord. 414,000+9,000=423,000.

414,000-9,000=405,000.

423,000+405,000=828,000.

423,000-405,000=18,

hope it

no one knows lol

step-by-step explanation: