Answer:
125-135
Step-by-step explanation:
The standard deviation is 7. This implies that the IQ scorings can be between 123 and 137. With a 90% confidence in these numbers, 125-135 is the closest interval to 90% confidence.
Answer:
180cm^2
Step-by-step explanation:
Just find the area of the triangles with A = 1/2 bh and the area of the square with A = s^2 and add them together to get 180cm^2.
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Answer:
the answer is 1
Step-by-step explanation:
If these points lie on the same line or coincides. then there are dozens of planes, passing through these points. If these point don't lie on the same line, then there is unique plane, which passes through these points.
Answer:
1 time
Step-by-step explanation:
If a and b represent the height and base of the triangular face, and h represents the length of its hypotenuse, and w represents the width or thickness of the prism, the surface area (A) is
.. A = ab +w*(a +b+ h)
Of course the area of each triangle is (1/2)ab, but there are two of them, so their total area is ab.
Put in the numbers and do the arithmetic. If you have a lot of them all specified in this way, a spreadsheet can make short work of it.
A = 5*12 +4*(5 +12 +13) = 160 . . . square inches