Jennifer can clean her room in 2 hours, while john can clean the same room in 5 hours. how many hours would it take for them to clean the room together?
7
10
seven tenths
ten sevenths
i think the answer is tenth sevenths but im not sure!asap

The temperature of chicken soup is 192.7°f. as it cools, the temperature of the soup decreases 2.3°f per minute. what is the temperature in degrees fahrenheit of the soup after 25 minutes? a. 27.3°f b. 57.5°f c. 135.2°f d. 250.2°f

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years