Pls help me! Pls show work so I know how to do it if you can’t then it’s fine! Thank you!

Substitute the given value into the function and evaluate .
Answer : 80 ? ( sorry if it’s wrong )

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.