Answer:
a. an = -1 • 4^(n - 1)
Step-by-step explanation:
It's easy see that each term is multiplied by 4 to get the next term, so the common ratio will be 4, that reduces the choices to answers A and B (since C and D use -1 as common ratio). Also, normally a geometric progression uses "n-1", so we'll first try with A to see if it works.
a1 = (-1) * 4^0 = -1 * 1 = -1
a2 = (-1) * 4^1 = -1 * 4 = -4
a3 = (-1) * 4^2 = -1 * 16 = -16
Yes, it works... so the answer is an = -1 • 4^(n - 1)
Answer: 2 - 4x = 6
Please mark me as brainliest
Answer:
This experiment has three factors (shampoo type, gender, whether hair is dyed)
Step-by-step explanation:
the researcher is trying to make a comparison between an old shampoo and a new on and also was gender sensitive as she considers their hair coloration too because it affects the result slightly.
Answer:
closest option B (50.24)
Step-by-step explanation:
A=πr²
= π×4×4
=π×16
=50.265m²
Answer:
200 miles
Explanation:
Here map to actual to scale: 1 inch = 50 miles
- On map distance: 4 inches
To find actual distance, simply multiply map distance by scale factor
Actual Distance : 4 × 50 = 200 miles
