I'm going to guess B but I'm not sure
Given that,
Shelley's pet food store sold one customer 5 peanut butter biscuits for $3. She sold another customer 7 beef treats for $4.20.
For peanut, the cost is ratio is

For beef, the ratio is

If we take cross product of these items,

It implies, that the sale is in true proportion. From the cross product, we find that it is equal.
A= (a+b+c)h is the formula. I hope this is helpful for you. I am pretty positive it will help.
Answer:
D
Step-by-step explanation:
I got it right on Khan Academy
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Answer:
We are absolutely certain that the event will occur
Step-by-step explanation:
An event with probability 1 is certain to occur. There is no chance it will not occur.
We are absolutely certain that the event will occur.