The temperature in minneapolis changed from -7 to 7. how much did the temperature increase

Can someone check if i did this correct. it’s number 4 if you’re wondering.

An account with a $250 balance accrues 2% annually. if no deposits or withdrawals are made, which graph can be used to determine approximately how many years will it take for the balance to be $282? it's e2020 ni️️as

Describe how making an ‘and’ compound sentence effects your solution set