If you have a distribution of 50 scores, and you want 5 intervals, what should be the size of your class interval?
1 answer:
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Answer:
a =
b= 4
Step-by-step explanation:
It's a 30-60-90 triangle based on the given picture. A right triangle too
Use sine, cosine, and tangent to solve for the side.
To find b, you can use sin(30) = b/8 because sin(angle) = opposite/hypotenuse.
OR you can use the rule for 30-60-90 triangle, which is x for short leg, 2x for hypotenuse, and for long leg
So either way, b = 4
To find a, you can use cos(30) = a/8 because cos(angle) = adjacent/hypotenuse.
OR you can use the same rule, 30-60-90 triangle to save time
a will end up =
Answer:
The answer is:
Step-by-step explanation:
If we add the angles inside a triangle, we must have . So we have an
angle and an
angle, their sum is
, so the missing angle must be