Answer:
D.
Step-by-step explanation:
-5.3 rounds up to -5
7.9 rounds up to 8
the sum of the two rounded is 3
her answer of 2.4 rounds to 2, not 3
so her answer is not reasonable
the interest is 195dollars
B
Noting the following rule of radicals
× =
Given
( + )( - )
Each term in the second factor is multiplied by each term in the first factor
= ( - ) + ( - ) ← distribute parenthesis
= - + -