Probably the most effective method researchers use to prevent sampling bias is through simple random sampling where samples are selected strictly by chance.
You can use logic to say right off the bat that you have 2 one dollar bills
if you said you had 7 instead there would be not enough bills to add up to 82
so that means 4 $5 and 6 $10
check you have 12 bills and it adds up to $82
2 $1
4 $5
6 $10
4 cups of water hope it helps
Answer:
18 out of 30
Convert fraction (ratio) 18 / 30
it's basically 18 divided by 30
18/30 = 0.6 = 60%
Answer: 60%
68.25 mph because 273÷4=68.25 so the answer is 68.25 miles per hour
