Answer:
79 units²
Step-by-step explanation:
The area of a circle is found by using the formula A = π x r². Since we are not given the radius we can use the formula r = C / (2π). Substituting in the given values, we get r = 31.5/(2π). 2 times pi is 6.283185307. 31.5 divided by this will get you 5.013380707. Now, put that value in for r in the area equation. A = π x 5.013380707². Pi times 5.013380707² equals 78.96074613. This can be rounded to 79. (Or 80 if you need to the nearest whole number.)
Answer:uh kinda
Step-by-step explanation:
Answer:
6371. six thousand three hundred and seventy-one
12(.25)= 3. 12-3= 9 for student tickets
x = adult tickets
y = student tickets
x + y = 55
12x + 9y= 585
-12x - 12y = -660
-3y = -75
3y = 75
y = 25 student tickets
x + 25 = 55
x = 30 adult tickets
