He pays $135 for 3 years. So that’s $45/year. Considering 900 is your 100%, how many percents are represented by $45 in 900?
1)
You can see that 900 = 9x100.
So you can divide 900 by 9 to get 100.
That means you can also divide 45 by 9 (it’s proportional)
You have 45 for 900, you divide by 9 so you get 5 for 100 -> 5%
Or 2)
(Photo)
It’s a cross-multiplication :
(45 x 100)/900 = 5%
So the interest rate is 5%.
(Sorry if it’s confusing, English isn’t my first language..)
81a²-25 would be the answer I'm pretty sure. Hopefully I helped.
Answer:
c
Step-by-step explanation:
so, that gives you the compounded amount, after 10 years, if you want to know how much interest was earned? well, just subtract the Principal from the Amount, or A - P <--- that's how much interest was earned
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
