Given
d(t) = 0.8t ^2
t= 5 secs
d(5) = 0.8(5)^2 = 0.8 * 25 = 20
t= 10 secs
d(10) = 0.8(10)^2 = 0.8 * 100 = 80
20 m / 5 secs = 4 meters per sec
80 m / 10 sec = 8 meters per sec
4 mps + 8 mps = 12 mps
12 mps / 2 = 6 mps
6 mps is the average speed of the rock between 5 and 10 sec after being dropped
Answer:
d
Step-by-step explanation:
its the correct answer
Hope this helps:)

<u>Step-by-step explanation:</u>
Here , we have In August, Cory begins school shopping for his triplet daughters. One day, he bought 10 pairs of socks for $2.50 each and 3 pairs of shoes for d dollars each. He spent a total of $135.97. We need to find What does d equal . Let's find out:
One day, he bought 10 pairs of socks for $2.50 each
Following is the equation for this info:
⇒ 
⇒ 
3 pairs of shoes for d dollars each
Following is the equation for this info:
⇒ 
⇒ 
He spent a total of $135.97
Following is the equation for this info:
⇒ 
⇒ 
⇒ 
⇒ 
Therefore ,
.
Answer:
A.
Step-by-step explanation:
Answer:
where is the question?
Step-by-step explanation: