Answer: $5 their are 36 donuts and 12 x 3 is 36 and 5 x 3 is 15
Answer:
q. (3+t)=2-4t
q.3+q.t=2-4t
4t+q.t=2-3q
t (4+q)=2-3q
t=2-3q/4+q
Step-by-step explanation:
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Answer:
B
Step-by-step explanation:
By the definition,

If
we can consider right triangle with hypotenuse 25 un. and adjacent leg 24 un. By the Pythagorean theorem,

So,

Answer:
The sample size needed is 2401.
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 of the interval is:

95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.
We have to find n, for which M = 0.02.
There is no estimate of p available, so we use 






The sample size needed is 2401.