Answer:
2,600
Explanation:
Your first step is to find 7% of 4000 ( this is what it is decreasing by per year).
As a result you end up with 280.
Multiply 280 by 5.
1,400 should be your answer( amount of km decreasing after 5 years). This is a decreasing forest, so you subtract 4,000by 1,400.
Answer:
The lowest fraction for
is
and a equivalent fraction with denominator of 32 is
.
Step-by-step explanation:
First, to have the fraction to the lowest terms we will have to divide the numerator and denominator by 2, this is:

As can be seen the expression couldn't be simplified more because there is no a common number that could divide the numerator and denominator.
Second, to have an equivalent fraction with 32 in the denominator we will have to multiply the denominator by 2 and of course the numerator, this is:

The lowest fraction for
is
and a equivalent fraction with denominator of 32 is
.
Divide 180 by 5 to get A-36
The class has a 14:17 ratio of boys to girls. Thus, we can say the group has 31 students. From there we can set a proportion. On one side of the equals is the small group. On another side, the 186 total children. We put boys on top, children on the bottom.
Let B be the number of boys in total.

We can either cross multiply or observe what happens on the bottom. On the bottom, how we do get from 31 to 186? We multiply by 6. So the top must get multiplied as well.
14 * 6 = 84
(If you cross multiply and solve for B, you get 31B = 2604. Divide both sides by 31, and 84 is the result.)
Thus, there are 84 boys.