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:
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Answer:
7.3%
Step-by-step explanation:
Given:
<em>Formula for Rate of interest </em>
:

Where
is the rate of interest.
dollars is the loan and
years is the time for which interest is to be paid

To find:

Solution:
Putting the given values in the formula:

Multiply the above value with 100 to find the percentage.
i.e.

Therefore, the answer is <em>7.3%</em>
The <em>correct answer</em> is:
D) Using cash can make it easier to over-spend since you know exactly how much you have.
Explanation:
Knowing exactly how much you have on hand will actually help you avoid over-spending.
When using cash, you are aware of exactly how much money you have. With a credit card, this may not be the case; this makes it easier with a credit card to spend more money than you should for your budget. With cash it's easier to avoid this problem.