Find the surface area of each prism. round to the nearest tenth if necessary while doing your calculations as well as in your final answer.

question 18 options:

552 units2

456 units2

360 units2

586 units2

The answer would be the 3rd one

n = 20

Step-by-step Explanation:
When dealing with ratios, there is always most likely a second number given to you. This number is going to be 1.
When looking for n, you have to look for all of the numbers, in this case there is only two.
1 is the hour, so now you just need the 20 minutes.
If the ratio is 1:n, this means that n would have to equal 20.
1:20