The answer for the question shown above is the first option, which is:
- Direct.
The explanation is shown below:
1. The problem says that <span>The number of tons of coal varies as the number of hours.
2. Therefore, you can write the following equation:
number of tons:x
number of hours:y
x=ky
Where k is the constant of variation.
3. Therere the variation is direct.</span>
It would cost $132. 7+7+15+15X3=132
Volume is Length x width x height. So what are three numbers that multiply to 90?
30x30x30=90