Answer:
Variance = 25
Step-by-step explanation:
<em>Standard deviation is the under root of variance.</em>
<em>Variance is the square of standard deviation.</em>
<u>Data:</u>
Mean = 70
Variance = ?
Standard deviation = √variance = 5
Variance = 5²
Variance = 25.
Therefore, the variance is 25.
Answer:
1/12
Step-by-step explanation:
First, you should already be able to understand that the only number less than 2 on this cube is 1. So, you can understand that there is a 1/6 chance because there is a total of 6 numbers, and out of those, only 1 of those are your answer.
Then, you will note that a coin only has 2 sides, so there is a 50/50 chance of getting heads, or 50%. Now, you will turn that into a fraction, which is 1/2.
Next, you will multiply to make the denominators the same. And what you do to the denominator must happen to the numerator. (1/6 * 2--> 1/12 and 1/2 * 6 = 1/12)
Hope this helps! :)
I start with 1 friend on Facebook. Every month I find that the number of friends I have triples.
<span>Month 0 --> y = 3^0 = 1 friend </span>
<span>Month 1 --> y = 3^1 = 3 friends </span>
<span>Month 2 --> y = 3^2 = 9 friends </span>
<span>Month 3 --> y = 3^3 = 27 friends </span>
<span>... </span>
<span>Month t --> y = 3^t </span>
$89.10 is the best guess.
