Answer: 1 Cup = 8 fl oz
Step-by-step explanation:
A) control group, they did not also survey 10 other ppl who took a placebo
Answer:
16 students got an A
Step-by-step explanation:
Set up an equation to compare the ratio to the scores:

Cross multiply:
80 = 5x
Divide each side by 5:
x = 16
Now, check if 
16/8 = 2
40/8 = 5
The ratios are the same! Therefore, 16 students got an A!
Hope this helps! Feel free to contact me if you have any questions :)
Round $3.29 to $3. Then subtract $7 and $3 to get $4