Answer:
Common ratio, r=-3
Recursive Formula

Step-by-step explanation:
The formula for the geometric sequence:
is given as:

<u>Common Ratio</u>
Dividing the next terms by the previous terms, we obtain:

Therefore, the common ratio of the sequence, r=-3
<u>Recursive Formula</u>
We observe that the next term,
is obtained by the multiplication of the previous term. f(n-1) by -3.
Therefore, a recursive formula for the sequence is:

Answer:
<em>t = 5 seconds</em>
Step-by-step explanation:
We must solve the equation of movement of the ball as a function of time in seconds.
We must find how many seconds it takes until the ball touches the ground. When the ball touches the ground, the height b (t) = 0
Then we equate the equation to zero and solve for t.

Use the quadratic formula.
Where


We take the positive solution
<em>t = 5 seconds</em>
Answer:
C) 
Step-by-step explanation:

Answer:
The ratio is 15:5 or 3:1. If Marianne is 3 years old, her brother is 1. And it is proportional...
Step-by-step explanation: