Question

Would each situation be represented by a positive or a negative number?
Column A
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.
Column B
A.
positive
B.
negative

Answer 1

I think it is B. negitive

Answer 2

Hey there :)

So for number 1,
Is the change in acreage going to be `positive` or `negative` ?
Is the amount of forest `increasing` or `decreasing` over time?

Answer 3

Any guesses? :)