99+72 = 9( ? +8) \ Pls help
1 answer:
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Answer:
Area of the photograph is
Step-by-step explanation:
The piece of cardboard is a square with side length as x.
The border that surrounds the photo is 3 inches on each side. So the length of the photograph is reduced by 3 inches for 2 times.
Hence, the length of photograph is =
The border also surrounds the photo is 4 inches on both the top and the bottom. So the width of the photograph is reduced by 4 inches for 2 times.
Hence, the width of photograph is =
The area of the photograph will be,
Answer:
It is impossible that the mean of the sample of 100 fertilizers less than 2 mg.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 2.5 mg
Standard Deviation, σ = 0.1 mg
We are given that the distribution of percentage of nitrogen score is unknown.
Formula with sampling:
P( mean of the sample of 100 fertilizers less than 2 mg)
P(x < 2)
Calculation the value from standard normal z table, we have,
Thus, it is impossible that the mean of the sample of 100 fertilizers less than 2 mg.