For the first one you are right it's 66 here's why:
You need to divide the total number of jumps BY the minutes she took to jump 246 times. Which means: 246 ÷ 4 = 66
For the second one:
- 8 ounces: $8.95
Number of dollars per ounce: 8.95 ÷ 8 = $1.12
- 10 ounces: $12.00
Number of dollars per ounce: 12 ÷ 10 = $1.2
So, The 8 ounces jar is cheaper with a difference of?
How to find the difference? It's as simple as ever.
1.2 - 1.12 = 0.08
So the answer is D because 'The 8 ounces jar' is cheaper than 'The 10 ounces jar' with a difference of 0.08 ...
I hope this helps! If it did, please mark me brainliest!! (Sorry you waited for 2 hours)
Don't ever say anything is hard because your mind will never accept to solve such a problem again. Everything in Maths is easy but just needs to be practiced and understood! ;)