<span>Standard deviation is the square root of variance. Variance is always a non-negative number, since you can't take the square root of a negative number. So neither can be negative </span>
Answer:
1.-(-2/15)=2/15
2.-(-13/17)=13/17
Step-by-step explanation:
We know that
surface area <span>of a three-dimensional figure=2*[area of the base]+perimeter of the base*height
therefore
the answer is false</span>
