Answer:
C
Step-by-step explanation:
120+60=180
Yes. Here's an example : I used 4 gallons of gas and drove 28 miles. The ratio is 4gallons for every 28 miles. 4 gallons: 28 miles.
Answer:
Associative Property
Step-by-step explanation:
The associative property lets us change the grouping, or move grouping symbols (parentheses).
Answer: 31
Step-by-step explanation:
Formula to find the sample size is given by :_

, where z*= critical value corresponds to confidence level.
= population standard deviation.
E= Margin of error.
As per given , we have

E=1
We know that critical value corresponding to 95% confidence level = z*=1.96
Then, the required sample size would be :



Hence, the required minimum sample size = 31
Answer:
Set up a proportion ,
80/x 9/100
9 is over 100 because it is a percent and 100% is the highest %.
doing a proportion you cross multiply getting you..
9x =80 x 100
9x= 800
divide by 9 on both sides
that determines your answer
you try !
Step-by-step explanation: