Which of the following statements about slang is true.

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.

If you are in grade when should you start studying for exams