I NEED HELP AP STATS THANK YOU!!

Uanita borrowed $600 to purchase a new computer. she was charged 7% interest for two years. she used the simple interest formula to find the interest. i = 600(7)(2) what error did juanita make and how will her error affect the interest she calculates? explain.

Which of the following shows the length of the third side, in inches, of the triangle below

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i