The question is "What's Stella's opportunity cost of working on her serve for an hour?" The rest of the info looks like it's meant to confuse you. They charge $10 an hour. She values an hour of her time at $20. I believe that means she would pay $20. Hope this helps!
Mark has 32 marbles and John has 96 marbles. If you add the marbles together they both have a total of 128.
Answer:
Step-by-step explanation:j7/10. 7 divided by 10. And .7
Answer:
Step-by-step explanation:
Hope this helps
