Hi there!
a.
To find the total amount of people that have ENTERED by t = 20, we must take the integral of the appropriate function.

Evaluate using a calculator:

b.
To solve, we can find the total amount of people that have entered of the interval and subtract the total amount of people that have left from this value.
In other terms:

We can evaluate using a calculator (math-9 on T1-84):


c.
If:

Then:

Evaluate at t = 20:


This means that at t = 20, there is a <u>NET DECREASE</u> of people at the movie theater of around 20.823 (21) people per hour.
d.
To find the maximum, we must use the first-derivative test.
Set S(t) - R(t) equal to 0:

Graph the function with a graphing calculator and set the function equal to y = 0:
According to the graph, the graph of the first derivative changes from POSITIVE to NEGATIVE at t ≈ 17.78 hours, so there is a MAXIMUM at this value.
<u>Thus, at t = 17.78 hours, the amount of people at the movie theater is a MAXIMUM.</u>
Answer: I think the answer is C lol
Explanation:
Answer: Green Driving (also known as Eco-Driving and Smart Driving) is a series of efficient driving practices that include avoiding unnecessary idling. Green driving is relatively new to the United States. In Europe, and other countries where fuel prices are two to three times higher, it has for years been a well-established practice, as it can save motorists significant sums of money annually. Green driving also reduces climate change producing carbon emissions, conserves energy, improves air quality, and even makes you a safer driver. Answer should be A.
- Martiinez <3
LOL go on a dating site or yubo for this typa stuff- jeezz
Do you have to write a paragraph for each one