Answer:
Number of gallons of water produced each cay by the company = 7200 gallons
Number of 1 gallon bottles put in a carton = 8
Number of cartons needed to hold all the 1 gallon bottles in a day = 7200/8
= 900
So 900 cartons are required to hold all the one gallon bottles produced by the company in a day. I hope the procedure is clear enough for you to understand. It is also important to carefully look at all the details that are provided in the question.
13/15
Common denominator is 15, 1 3/15 minus 5/15 equals 13/15
Applying Pythagoras Theorem
c² = 6² + 3²
c² = 36 + 9
c ² = 45
c = √45
Hi.
An example of a fraction equivalence chain is this:

You can keep multiplying

by 2 to get a fraction chain.
Hope this helps!
The sum of n terms of a geometric sequence with first term "a" and common ratio "r" is given by

You have a=21, r=3, so the sum of 10 terms is

The appropriate choice is the 2nd one:
620,004