I pretty sure the form is 2, and she bought 10 books, 5b-7=58
Answer:

Step-by-step explanation:
step 1
<u>Find the volume of the tank</u>
we know that
The volume of a cylinder (water tank) is equal to

in this problem we have
-----> the radius is half the diameter
substitute

step 2
Find the cost

Answer:
160 degrees
Step-by-step explanation:
Answer: (B) 30 gallons.
Step-by-step explanation: Lets subtract 110 - 78 to find the maximum amount of additional water, w that can be added to the tub.
110 - 78 = 32.
round 32 to 30.
So, a reasonable value would be 30 gallons.