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VashaNatasha [74]
3 years ago
9

Summer Storme is analyzing an investment. The expected one-year return on the investment is 20 percent. The probability distribu

tion of possible returns is approximately normal with a standard deviation of 15 percent. a. What are the chances that the investment will result in a negative return? b. What is the probability that the return will be greater than 10 percent? 20 percent? 30 percent? 40 percent? 50 percent?
Mathematics
2 answers:
TiliK225 [7]3 years ago
8 0
S s sbbdbdbdbdb dhsbdhdnr
Eva8 [605]3 years ago
3 0

Answer:

suchh harddb

Step-by-step explanation:

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Brums [2.3K]

Answer: sqrt(2)/2  which is choice D

======================================================

Explanation

(3pi/4) radians converts to 135 degrees after multiplying by the conversion factor (180/pi).

The angle 135 degrees is in quadrant 2. We subtract the angle 135 from 180 to find the reference angle

180-135 = 45

Then you can use a 45-45-90 triangle to determine that the ratio of opposite over hypotenuse is sqrt(2)/2

sine is positive in quadrant 2

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Alternatively, you can use a unit circle. Refer to the diagram below. In red, I've circled the angle 3pi/4 radians. The terminal point for this angle has a y coordinate of sqrt(2)/2

Recall that y = sin(theta).

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C they rise upward toward the right
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Maria's plant grew 3 1/4 inches every month for 2 1/2 months. How many inches did Maria's plant grow during that time?
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