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Vitek1552 [10]
2 years ago
11

A light bulb manufacturer claims that the lifetime of the bulbs is normally distributed with a mean of 5000 hours and a standard

deviation of 250 hours. If 20000 bulbs are produced on a particular day, what percentage of the bulbs will have a lifetime of between 4750 and 5500 hours?
Mathematics
1 answer:
daser333 [38]2 years ago
8 0

Answer:

88

Step-by-step explanation:

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Solve for x then y.<br> y+10=-1/6(x-6)
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Answer:

y= -x/6-9

x= -6y-54

Step-by-step explanation:

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Can anyone help me with this problem?
Katen [24]
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If the nth term of a sequence is 10n what is the 12th term
Lisa [10]

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10th term is 120.555

Step-by-step explanation:

6 0
2 years ago
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Help on both of these pls<br> also sry the lighting is weird
IRISSAK [1]

Answer:

see explanation

Step-by-step explanation:

The 2 angles form a right angle, thus their sum is 90°, hence

4x + 7 + 35 = 90

4x + 42 = 90 ( subtract 42 from both sides )

4x = 48 ( divide both sides by 4 )

x = 12

-----------------------------------------------------

To calculate the slope m use the slope formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (1, 4) ← 2 points on the line

m = \frac{4-0}{1-0} = \frac{4}{1} = 4


5 0
3 years ago
What radius of a circle is required to inscribe a regular hexagon with an area of 166.28 in2 and an apothem of 6.928 in?
Lunna [17]
If you want to inscribe a polygon inside a circle, you have a formula that doesn't have to use the apothem. The formula is:

A = (nr²/2)sin(360/n)

Since the polygon is a hexagon, it has 6 sides. Thus, n = 6. Knowing the area, we can determine the radius of the circle, r.

166.28 = (6r²/2)sin(360/6)
r = 8 inches

Thus, the radius of the circle is 8 inches.
7 0
3 years ago
Read 2 more answers
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