Answer:
C. 20 seconds
Step-by-step explanation:
We want to know when y=0
The first y is when it started and the second y=0 is when it stops
Looking at the graph y=0 at x=0 and y=0 at x=20
The fan started at time 0 and stopped at 20 seconds
Step-by-step explanation:
When the inequality uses < or >, it is a broken line.
For the point (0, 0) it means that x = 0 and y = 0.
Since (0) < (0)² + 4(0) + 5 is true, the point is part of the solution.
Answer:
EA
Step-by-step explanation:
