Step-by-step explanation:
$68 000 × 8 years
= $544 000
$1 500 × 8 years
= $12 000
$544 000 + $12 000
= $556 00
The square of a rational number is a rational number.
<h3>What are rational numbers?</h3>
A rational number is a number that is expressed as the ratio of two integers, where the denominator should not be equal to zero.
A rational number is a number that is of the form p/q where p and q are integers and q is not equal to 0.
Therefore, rational numbers are express as follows; p / q.
Hence, x is a rational number . let's confirm that x² is rational or not.
Therefore, When we square a rational number, each prime factor has an even exponent.
For example
p / q = p²/ q²
Hence, the square is a rational number.
learn more on rational number: brainly.com/question/14066831
#SPJ1
The answer is Mike.
Mike is improving the score most as he uses 10% of the credit limit.
The one who uses less percent of his credit limit will improve his/her score and the one who uses greater percent of his credit limit will less improve his scores.