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:
B
Step-by-step explanation:
You simplify it using radicals.
Answer:
positive, its above 0
Step-by-step explanation:
Nina's rate is 12.7 mph and Sophia's rate is 10 mph. Therefore, Nina is faster.
Answer:
Yes
Step-by-step explanation:
A rational number is a number that could be written in fraction form or ratio.