Answer: 9/12
Step-by-step explanation:
B. 1/40…. You divide 1/2 by 20 to find out how much hand sanitizer was used on each desk. You can keep change flip meaning keep the 1/2 change the division to multiplication and flip the 20 to 1/20 then multiply. 1/2 by 1/20 which equals 1/40.
Answer:

Step-by-step explanation:
Using the rule of exponents
=
, then
=
= 
Nine point zero tenths and five ones