Answer:
Part 1) The new distance from the water to the top of the tank is 
Part 2) The maximum number of balls that can be put into the tank with the tank not overflowing is 95
Step-by-step explanation:
step 1
Find the total volume of the tank

step 2
Find the volume of the tank if the water level is two inches below the top of the tank

step 3
Find the volume of the glass sphere
The volume of the glass sphere is equal to

we have

assume

substitute


step 4
What is the new distance from the water to the top of the tank?
we know that

so
using proportion
Find how many inches correspond a volume of 

The new distance from the water to the top of the tank is

step 5
Find how many of these balls can be put into the tank with the tank not overflowing
we know that
The volume of one ball is equal to 
using proportion

therefore
The maximum number of balls that can be put into the tank with the tank not overflowing is 95
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Are the answers the first line is for the first question same for the second and 3rd
For the answer to the question above, your end goal is to have $6,000 total in 12 months. since you have $2400 already you can subtract that from 6,000 leaving you with $3600 over the course of 12 months. since you already put $150 in a month over the course of 12 months you would have $1800 which is only half of the goal of $3600. in order for you to put in $3600, you would have to put an additional 150 in your savings along with your regular 150 making Letter B the answer.
First, let's fine the decimal of each fraction.
-5 Divided By 6 = -0.83333333333
17 Divided By 18 = 0.94444444444
-2 Divided By 9 = -0.22222222222
-5/6 - 17/18 - (-2/9) = -1.55555555556