The 2010 United States census reported 2,500,600 people lived in the United States. The 2020 census reported that 50% more people lived there. How many people live there in 2020?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?