7-14 One day without talking about this and completely forgot how to do it.
Please help (especially on the ÷ & ×)

Multiplying an even number of negative numbers gives an answer that is choose from:

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'