Answer:c 57
Step-by-step explanation:
The distance traveled by the balloon in every minute makes an arithmetic sequence with a first term equal to 40 ft and common difference equal to 20. The nth term of an arithmetic sequence is calculated by,
an = a1 + (n - 1) x d
Substituting,
an = 40 + (15 - 1) x 20 = 320
Thus, the answer is letter B. 320 feet.
Answer:
The answer to your question is: the points are not collinear.
Step-by-step explanation:
Data
AB = 7
BC = 4
AC = 9
Are points A,B and C collinear?
If they are collinear, the distance from AB plus the distance BC must be equal to the distance AC.
Process
dAB + d dBC = d AC
7 + 4 = 9
11 = 9
The distances are different so they are no collinear