BDC and ACD are complementary with each other. that means together they cover the full 180 degrees of the half circle that can be drawn on one side of a flat line.

180 = 11x + 25 + 4x + 5 = 15x + 30

150 = 15x

x = 10

BDC = 11x + 25 = 11×10 + 25 = 110 + 25 = 135 degrees

ACD = 4x + 5 = 4×10 + 5 = 40 + 5 = 45 degrees

7 0

3 years ago

Assume the mean useful life of a particular light bulb is 2,000 hours and is normally distributed with a standard deviation of 3

Yuri [45]

The mean = 2,000
s = Sigma ( standard deviation ) = 300
M - 2 s = 2,000- 2 * 300 = 2,000 - 600 = 1,400
M + 2 s = 2,000 + 2 * 300 = 2,000 + 600 = 2,600
Answer.
Useful life of light bulbs within 2 standard deviations of the mean is:
A ) Between 1,400 and 2,600 hours

4 0

3 years ago

carter needs to wrap 7 presents. he lays the ribbon out flat and says ,if i nake 6 equally spaced cuts i'll have just enough pie

Andrej [43]

Yes he does. If you cut something 6 times you make 7 pieces

8 0

3 years ago

What is the distance between-3,5 and -3,-8

vladimir1956 [14]

13 is the answer if I'm correct

3 0

3 years ago

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