A teenager ate 2/9 of a pizza in 5/18 of an hour. If the teenager ate at a constant rate, how long will it take for the teen to eat a whole pizza?

It would take 1.25 hours,

Step-by-step explanation:

if you multiple 2/9 by 4.5 you will get 9 so you need to do the same for 5 which gives you 22.5 which divided by 18 gives you 1.25

Ellen invested $150 and bob invested $180. at a ratio of 5: 6, ellen must have invested a little less than half the money and bob must hsve invested a little more than half. a convenient estimate would be 150 for ellen and 180 for bob. now we have to check the ratio to determine whether we need to adjust our estimate. 150/30 equsls 5 and 180/30 is 6, so the ratio would be 5: 6 and our estimate was right on? so we don't have to adjust.