<h2>
Answer:</h2>
We have the following function:

And this function models the height
, in feet, of an object above ground
seconds after being launched straight up in the air. The graph of this function is shown below. So we want to know what the number 72 represents. Well, what if
?
If
we have:

Thus, <em>72 is the height of the object above the ground at
. In other words, 72 is the initial height of the ball before being launched straight up in the air.</em>
Answer:
Both angles B and C are equal to 40°
Step-by-step explanation:
The diagram tells you that the triangle is an isosceles triangle. From this we know that angles B and C will be equal to each other. To find what the angle measures are, we are going to set the two given expressions equal to each other, solve for x, and the plug x back in to get the two angle measures.

Now we are going to plug x back into each expression to solve for angles B and C.
Angle B
⇒ 
Angle C
⇒ 
Both angles B and C are equal to 40°
The surface area would be <span>4633.95 mm</span>
Answer: 74 adult tickets were sold on Wednesday.
Step-by-step explanation:
Let x represent the number of child admission tickets sold on Wednesday.
Let y represent the number of adult admission tickets sold on Wednesday.
On Wednesday, 128 tickets were sold. It means that
x + y = 128
At the movie theatre, child admission is $6.40 and adult admission is $9.70. The total ticket sales on Wednesday was $1063.40. It means that
6.4x + 9.7y = 1063.4- - - - - - - - - - 1
Substituting x = 128 - y into equation 1, it becomes
6.4(128 - y) + 9.7y = 1063.4
819.2 - 6.4y + 9.7y = 1063.4
- 6.4y + 9.7y = 1063.4 - 819.2
3.3y = 244.2
y = 244.2/3.3
y = 74
x = 128 - y = 128 - 74
x = 54