Suppose that a travel bureau claims that the trees in a forest are 84 feet tall on average, with a standard deviation of 2 feet. If you took a sample of 64
trees, which of the following mean heights would be outside the 95%
confidence interval?
A. 84.6 feet
B. 84.4 feet
C. 84.2 feet
O D. 83.6 feet
SUBMIT

correct answer:

i^31 = -i

the radius is 2 times the diameter.

step-by-step explanation:

isocolese triangle

we know that the line connect a and b is the hyptonuse

so first find the hypotonuse length using the distance formula, call the length c

since it is an isocolese triangle, the lengths of the legs are the same

using pythagorean theorem,

in this case, a=b since isocolese triangle so we get

or

we can find c so we can find the distances

we know that if we draw 2 circles, each has center at a and b, and find where they intersect, we can the 2 possible locations for c

if a has center at (xa,ya) and b has center at (xb,yb), then we can solve where

and

intersect to find where they intersect

i'm not going to put an example because i have to go to class. i hope this explanation is enough