<span>ratio of surface area = 49:100
ratio of corresponding lengths = √49:√100 = 7:10
answer: C
Hope this helps
</span>
Answer:

Step-by-step explanation:
Given



Required
The probability of selecting 2 same colors when the first is not replaced
The total number of ball is:


This is calculated as:

So, we have:

<em>Note that: 1 is subtracted because it is a probability without replacement</em>






A = 1/2 bh
multiply each side by 2
2A = bh
divide each side by b
2A/b =h
The height of a triangle is equal to twice the area A divided by the base ,b.
Answer: -13, -17, -21
Explanation: Subtract 4 from each term. Do this for 3 terms