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: OPTION B.
Step-by-step explanation:
Given the following equation:

These are the steps to solve it:
<em>Step 1</em>
Add like terms on the left side of the equation:

<em>Step 2</em>
Apply Addition property of equality, which states that: 
Then, we can add 25 to both sides of the equation:

<em>Step 3</em>
Applying the Subtraction property of equality, we can subtract
from both sides:

<em>Step 4</em>
Applying the Division property of equality, we can both sides of the equation by 3. Then:

The coverage for medical expenses of occupants of the car is provdied by "Medical Expense" or "Medical Payments" coverage.