Answer:
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Step-by-step explanation:
By pythagorean theorum we calculate the height:

=
= height of triangle
area of triangle = base * height
area = 
There are two triangles so:

Multiply this by 13.25 to get total cost:
=$259.65
F(x) = -x² + 4
f(3) = -3² + 4
f(3) = -9 +4
f(3) = -5
Answer:
1162 tickets will need to be sold
Step-by-step explanation:
8134 / 7 = 1,162
The answer would be 14 cm.
The formula to find diameter is d=2r
D= diameter
R= radius
The 2 is there because you have half of the diameter so just times by 2 to get the diameter.