Answer:
3 and 12 students
Hope it helps
Step-by-step explanation:
6 is 4.9 and 6.2 but i’m not sure about 7 tho
Answer:
<h2>2.2</h2>
Step-by-step explanation:
Use the cosine law:

We have:

Substitute:

Why not look up "standard deviation" yourself, to be sure? But yes, the std. dev. is the sqrt of the variance.
The sequence is being multiplied by three for ever term.
If you multiply 1 by 3, the result will be 3. Keep on multiplying each term by three and you'll find that the 10th term is 729