The expression is given by:

So we need to find an equivalent equation for this problem. Then, we will apply some mathematical rules:
Extracting the common factor 1/4, then:

Or extracting the common factor -1/4, then:

So, comparing these solutions with the answers about, there is no any answer that matches.
The expression in company B represents that is is in arithmetic progression where first term is 42000 and common difference is 1800 . So we have to use the formula of sum of n terms which is

Where a is the first term, n is the nth term, d is the common difference
On substituting there values,we will get

= 15(84000+52200) = 15*136200 =2043000
And for company A, it is

Difference between them =2043000-2002500= 40500
So the correct option is the second option .
Answer:
=72
Step-by-step explanation:
57+68+32+59+72=288
360-288=72
Answer:
4
Step-by-step explanation:
ok
Answer:

Step-by-step explanation:
Given

Required
Convert to fraction
To do this, we simply multiply the fraction by 100%
This gives:



The expression cannot be further simplified.
Take for instance the fraction is: 
Using the same analysis, the percentage would be:



