The Average speed would be 60 miles per hour.
- Divide 330 by 5.5 hours
Answer:
60
Step-by-step explanation:
Substitute 50 for y in the formula
5x+10y=800
5x+10*50=800
5x+500=800
5x=800-500
5x=300
x=300/5
x=60
Part a: Option D 18 feet per second
Part b: increasing
Solution:
Height 
Part a: To find the average rate of change for h(t) between t = 0 and t = 2.
Substitute t = 0 in h(t).

h(0) = 3
Substitute t = 2 in h(t).
h(2) = 39
Average rate of change formula:

Here, a = 0 and b = 2.



= 18
Average rate of change = 18 feet per second
Option D is the correct answer.
Part b:
This means height of the ball is increasing for 0 < x < 2.
Answer:
1.25 ft long
Step-by-step explanation:
Answer:
percentage change= 500%
Step-by-step explanation:
After diet the weight reduced = 30 pounds
Before diet her weight = 180 pounds
percentage change = { (180 - 30) ÷ 30 } × 100
= ( 150 ÷ 30) × 100
= 5 × 100
= 500 %
∴percentage change= 500%