Answer:
(a) 
(b) 
(c) 
Step-by-step explanation:
We have given velocity as function of t 
Acceleration is equation rate if change of velocity with respect to time
So 
(a) Acceleration at t = 5 sec

(b) Acceleration at t = 10 sec

(c) Acceleration at t = 20 sec

Answer: 
Step-by-step explanation:
In the given picture , the line is parallel to the y- axis and passing through (-2,2) and (-2 , -3).
The equation of line parallel to y-axis (has slope undefined) is given by
x= a , where a is the point on x-axis through which the line is passing .
For the given graph , the line is passing through x = -2.
Therefore , the equation of the given line = 
Hence, the correct answer = 
Positive becouse it goes from negative to positive.
Answer:
Step-by-step explanation:
Ben drinks 3 1/2 liters of tea every 40 minutes.
This means that he would drink 1 3/4 of tea every 20 minutes (divide both sides by 2).
Now, let's multiply each side by 3.
1.75 * 3 = 5.25 (aka 5 1/4)
20 * 3 = 60 minutes (an hour)
He drinks 5 1/4 liters of tea in one hour.