Answer:
5 seconds
1220 ft
Step-by-step explanation:
Step 1: Know when the stone reaches the maximum height
We know the maximum or minimum height of a parabola is at the vertex so we need to find the vertex
Step 2: Calculate the vertex
The t coordinate of the vertex can be calculated with 
b = 160
a = 16
Step 3: We know the t coordinate we can find the height at that time
Therefore the stone reaches its maximum height of 1220 ft in 5 secs
Answer:
Yes they are equivalent
Step-by-step explanation:
8x + 18 + x = 9x + 18
9(2+x) = 18 + 9x = 9x + 18
Therefore, 8x + 18 + x is equivalent to 9(2+x)
Answer: b
Step-by-step explanation:
Answer:
60
Step-by-step explanation:
x + 0.30x = 78
1.30x = 78
x = 60
When you get to the point where the width is larger than the length, you can stop because you have exhausted all the possibilities. The greatest area will be the rectangle that is closer in to a square than any of the others.
