Question

Would each situation be represented by a positive or a negative number?

Column A

Column B



1.
1.5 acres of rainforest are destroyed every second for s seconds. Express the change in acreage of rainforest.


2.
A tub of water is heated by 0.3 degrees per minute for m minutes. Express the change in temperature.


3.
A submarine descends at a rate of 0.9 m/s for 90 s. Express the change in altitude relative to sea level.


4.
A credit card account has 2 charges of $15 and no payments. Express the balance of the credit card.

A.
positive
B.
negative

Answer 1

1. being destroyed would be a negative number

2. water increasing in temperature is a positive number

3.descending would be a negative number

4. credit card charge would be a positive number