When n = energy efficiency and pin = energy input and pout = energy output, how can you mathematically represent the correct relationship between the energy you put in something and the energy you get out?
a. n = p out * p in
b. n = p out / p in
c. n = p out - p in

Step-by-step explanation:

We know that,

If represents the energy input,

represents the energy output,

And, n represents energy efficiency,

Hence, the required formula would be,

i.e. OPTION B is correct.

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.