Let n be unknown number, then 1/5 of this number is 1/5n. When you add these two numbers, you get

You know that this sum is equal to 24, so

1. Multiply this equation by 5:

2. Solve it:

Answer: n=20, correct choice is B.
Step-by-step explanation:
1minute=2lap
30lap=30/2
=15minutes
Answer:
<em>The function to represent this relationship will be:
</em>
Step-by-step explanation:
varies inversely with
. That means......
where
is a proportional constant.
Given that, when
, then 
Plugging these values into the above equation, we will get.....

Now plugging this
into equation (1).....

So, the function to represent this relationship will be: 
Answer:
3
Step-by-step explanation:
It is the highest exponent value.