B. 6
Explanation: 8(6+4)= 80
38+ 7(6)= 80
The answer is 7.75. Since there can not be 7.75 days, you can round that to 8 and say that it's almost 8 days. Hope this helps!
20.sometimes
21.always
22.always
23.sometimes
Step-by-step explanation:
Below is an attachment containing the solution.