Answer:
The cost of a 12 minute call to France is $ 3.63
Step-by-step explanation:
given:
The cost of 15 minute call to France = $ 4.29
The cost of 10 minute call to France = $ 3.19
To Find :
The cost of a 12 minute call to France = ?
Solution:
Let the flat fee be X
and the cost per minute be Y
so the 15 minute call to France will be
X + 15(Y) = 4.29---------------------------(1)
the 10 minute call to France will be
X + 10(X) = 3.19----------------------------(2)
Subtracting (2) from (1)
X + 15(Y) = 4.29
X + 10(Y) = 3.19
- - -
---------------------------------
5Y = 1.10
--------------------------------
Y = 0.22
So the cost per minute of a call = $0.22
substituting the values in (1)
X + 15(0.22) = 4.29
X + 3.3 = 4.29
X = 4.29 -3.3
X = 0.99
Now the cost of 12 minute call is
=>X + 12(Y)
=> 0.99 + 12(0.22)
=> 0.99 + 2.64
=> 3.63
Answer:
The park owners should take into account the population of children in the community, if there are a good number of kids living in that area and the towns nearby - there would be a great demand for another roller coaster. They should consider the safety measures on the particular roller coaster they intend to add and check for the available space where they plan to fit the ride in the park.
Hope that answers the question, have a great day!