On Friday, Michael's plant was 5/6 foot tall. It had grown 1/3 from Wednesday to Friday. It had grown 3/8 foot from Monday to Wednesday. How tall was Michael's plant on Monday?

Ithink the answer is b.

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.