15 miles 2.5 x 6 because 1/4th of an hour is 15 minutes 15 x6 = an hour and a half
Answer:
12y=m
Explaination:
because there's 12 months in a year
I hope this is right
Answer: A.$23.00
Step-by-step explanation:
This question is incomplete, please remember to be carful and submit the whole question :)
However, if we assume the money Tommy's class substracted from its penny collection is , we will have the following:
<em>Marty's class collected in a school-wide penny collection contest. If Tommy's class collected,, then substracted and then multiplied the difference by 2,they would have the same amount of money as Marty's class. How much money did Tommy's class collect?</em>
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This can be mathematically expressed as follows:
Isolating , which is the amount of money Tommy's class collected:
Hence, the correct option is A.
Answer:
Step-by-step explanation:
Confidence interval for the difference in the two proportions is written as
Difference in sample proportions ± margin of error
Sample proportion, p= x/n
Where x = number of success
n = number of samples
For city 1,
x = 22
n1 = 155
p1 = 22/155 = 0.14
For city 2,
x = 12
n2 = 135
p2 = 12/135 = 0.09
Margin of error = z√[p1(1 - p1)/n1 + p2(1 - p2)/n2]
To determine the z score, we subtract the confidence level from 100% to get α
α = 1 - 0.95 = 0.05
α/2 = 0.05/2 = 0.025
This is the area in each tail. Since we want the area in the middle, it becomes
1 - 0.025 = 0.975
The z score corresponding to the area on the z table is 1.96. Thus, confidence level of 95% is 1.96
Margin of error = 1.96 × √[0.14(1 - 0.14)/155 + 0.09(1 - 0.09)/135]
= 1.96 × √0.00138344086
= 0.073
Confidence interval = 0.12 - 0.09 ± 0.073
= 0.03 ± 0.073
C. Since the confidence interval does not include zero, there is evidence that the vacancy rates are different between the two cities.