Please help, not so good with this subject

I believe the answer is d

Step-by-step explanation:

A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers.

In this case, since can be simplified to 9 and 9 can be written as a fraction (9/1) it is a rational number.

answer: $420.00

step-by-step explanation:   multiply $400.00 by 5%.

400.00*.05=20

400+20 = 420

your question is incomplete, write all the numbers in the sequence that it tells you.  

step-by-step explanation: