Answer:
Step-by-step explanation:
To Find the perimeter you have to add the lengths of the rectangle's four sides. If you have only the width and the height, then you can easily find all four sides (two sides are each equal to the height and the other two sides are equal to the width).
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[RevyBreeze]
The area of a trapezoid is:
A = area
a = base 1
b = base 2
h = height
Area = unknown
base 1 = 2.5
base 2 = 7.5
height = 2.5
^^^Plug these numbers into the formula!
A = (10/2)(2.5)
A = (5)(2.5)
A = 12.5
Hope this helped!
Margin error of a sample mean is given by
where σ is the standard deviation,
is the critical value and n is the sample mean.
So beside the given standard deviation, we're supposed to know the sample size and critical value to answer this question.
Answer:
D. Parallelogram
Step-by-step explanation:
0.416 reoccurring is the answer
