Question

for each scenario, choose the best statement.

scenarios	statements
(b) the temperature drops 4 °f and then rises 8 °f.	∘ the temperature is higher than its beginning value. <br> ∘ the temperature is lower than its beginning value. <br> ∘ the temperature is at its beginning value.
(c) a roller coaster goes down 20 feet and then up 10 feet.	∘ the roller coaster is above its initial height. <br> ∘ the roller coaster is below its initial height. <br> ∘ the roller coaster is 0 feet from its initial height.

Explanation:

Step1: Analyze scenario (a)

Let initial employees = $n$. Net change: $n + 16 - 16 = n$, so change = $0$.

Step2: Analyze scenario (b)

Let initial temp = $t$. Final temp: $t - 4 + 8 = t + 4$, so final > initial.

Step3: Analyze scenario (c)

Let initial height = $h$. Final height: $h - 20 + 10 = h - 10$, so final < initial.

Answer:

(a) The overall change in the company's size is 0 employees.
(b) The temperature is higher than its beginning value.
(c) The roller coaster is below its initial height.