The volume of a certain hot air balloon is increased by 10% and flown for several hours. Then the new volume is decreased by 10%. What is the percentage volume of the hot air balloon at the end as compared to its very first volume?

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

What is the value of x when x + 7 = 21?

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)