James earns $13 an hour. John earns $4 an hour. If, after working for a whole number of hour, they both earned the same amount,
2 answers:
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Answer:
1.84
Step-by-step explanation:
The given arc is a part of a unit circle centered at origin.
The x-coordinate on the unit circle represent the cosine value and y-coordinate on the unit circle represent sine value.
So, for angle equal to °, the x coordinate represents
°.
So, ° = 0.86
Similarly, the y-coordinate of angle y represent °.
So, ° = 0.98
Therefore, the value of ° +
° = 0.86 + 0.98 = 1.84.
ANSWER
EXPLANATION
We were given that,
This implies that,
We use the Pythagorean identity
to get,
We were also given that,
This means that,
This is because,
This angles are in the first quadrant so we pick the positive values.
The correct answer is D
EXPLANATION
We were given that,
This implies that,
We use the Pythagorean identity
to get,
We were also given that,
This means that,
This is because,
This angles are in the first quadrant so we pick the positive values.
The correct answer is D
Answer: A. 664
Step-by-step explanation:
Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.
But there is no information regarding the population proportion is mentioned.
Formula to find the samples size , if the prior estimate to the population proportion is unknown :
, where E = Margin of error.
z* = Two -tailed critical z-value
We know that critical value for 99% confidence interval = [By z-table]
Margin of error = 0.05
Then, the minimum sample size would become :
Simplify,
Thus, the required sample size= 664
Hence, the correct answer is A. 664.