Cody because 18 out of 20 is %90 and 24 out of 30 is %80
Collect like terms and you'll get -2 - 3(a - b)
2 years older then Marjorie.....m = Marjorie
m + 2 <== ur expression
There are 60 minutes in an hour and percent means per one hundred so:
p/100=18/60
p=1800/60
p=30%
Answer:
1727 students
Step-by-step explanation:
Here we have the formula for sample size given as

Where:
p = Mean
ME = Margin of error = 3
z = z score
Therefore, we have
p = 150/240 = 0.625
z at 99 % = 2.575
ME =
3%
Therefore 
The number of students Professor York have to sample to estimate the proportion of all Oxnard University students who watch more than 10 hours of television each week within ±3 percent with 99 percent confidence = 1727 students.