Answer:
a. 
b. 
Step-by-step explanation:
a.


Where, 


Where, 

Volume of the shaded figure = 
b.
expressed in factored form:
Look for the term that is common to 9a³ and 9ab², then take outside the parenthesis.

The expression, if that's what ur looking for, is 1(x)+4 or just x+4
Answer: It took 65 hours for her to drive
Step-by-step explanation:
Estimating an angle measure in a problem can be useful when the actual angle measurement cannot be determined
<h3>When estimates are useful</h3>
Estimates are simply used to approximate and to guess the actual value of a measured quantity
In angles, when the actual measurement is not known, the estimate can be used in place of the actual value
Hence, estimating an angle measure can be useful when the actual angle measurement cannot be determined
Read more about estimation and approximation at:
brainly.com/question/6768038
Subtract 89 from 5 to get how many green marbles in the bag