Answer:
B.
Step-by-step explanation:
The dillation implies that both triangles RST and R'S'T' are similar and satisfies the following relationships:
(i)
(ii) (Enlargement)
There, the only option that fulfills this requirements is B. The correct answer is .
Answer:
We must survey at least 48 people from this younger age group.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is:
90% confidence level
So , z is the value of Z that has a pvalue of , so .
How many of this younger age group must we survey in order to estimate the proportion of non-grads to within .10 with 90% confidence? Use the value of p from the over-50 age group.
This is n when
So
Rouding up,
We must survey at least 48 people from this younger age group.
Answer:
I did the math and checked it im pretty sure this is the right answer
Subtract
$72 - $60 = $12
$12 profit
You then put the profit increase OVER the original price, making it a fraction. 12/60 now if you simplify this it is 1/5.
1/5 into a decimal is .20 and .20 to percentage is .20 x 100 = 20%
You can turn fractions to a decimal by diving the numerator by denominator. Just think of the line as the word DIVIDE.
Answer: 20% increase
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