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Goshia [24]
3 years ago
10

Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard deviation of 110 hours. If e

xactly 90% of the bulbs die before 930 hours, find the mean lifetime of the bulbs. Carry your intermediate computations to at least four decimal places.
Mathematics
1 answer:
makkiz [27]3 years ago
6 0

Answer:

sorry bro

Step-by-step explanation:

i really need the points

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Juan read 15 books in 9 months. How many books did he read in 24 months? And how many months did it take him to read 5 books?
larisa86 [58]
0.8 months stan loona

8 0
3 years ago
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The weather outside was very abnormal. The temperature started out at 6°C in the morning and went to -13°C at noon. It stayed at
ASHA 777 [7]

Answer:

At 6 pm, the temperature was 13°C below the freezing point

Step-by-step explanation:

Let us first express the information clearly to determine the temperature at 6 p.m:

The temperature in the morning = 6°C

the temperature at noon (12pm) = -13°C

It stayed at that temperature for six hours; this means that the temperature from 12 noon to 6 pm = -13°C

∴ Temperature at 6 pm = -13°C

Next let us calculate how far -13 is, below freezing point (0)

Difference = 0 - (-13)

= 0 + 13 = 13°C

Therefore, at 6 pm, the temperature was 13°C below the freezing point

7 0
3 years ago
1000*0+321*15678*9(-4563)
Vikki [24]

Answer:

-206675344746

Step-by-step explanation:

1000*0+321*15678*9(-4563) = -206675344746

7 0
3 years ago
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A. Given f(x)=x3 use the Mean Value Theorem and find all point c, 0
m_a_m_a [10]

Answer:

a) x \approx 1.155, b) x = \pm\frac{i}{2}, for all i = \{0,1,2,3,... \}

Step-by-step explanation:

a) The slope associated with the mean value is:

f'(c) =\frac{f(2)-f(0)}{2 - 0}

f'(c) = \frac{8-0}{2-0}

f'(c) = 4

Let differentiate the function:

f'(x) = 3\cdot x^{2}

The value associated with the slope is:

3\cdot x^{2} = 4

x = \sqrt{\frac{4}{3} }

x \approx 1.155

b) The slope associated with the mean value is:

f'(c) =\frac{f(2)-f(0)}{2 - 0}

f'(c) = \frac{1-1}{2-0}

f'(c) = 0

Let differentiate the function:

f'(x) = - 2\pi \cdot \sin (2\pi\cdot x)

The value associated with the slope is:

-2\pi\cdot \sin (2\pi\cdot x) = 0

\sin (2\pi\cdot x) = 0

2\pi\cdot x = \sin^{-1} 0

2\pi \cdot x = \pm \pi \cdot i, for all i = \{0,1,2,3,... \}

x = \pm\frac{i}{2}, for all i = \{0,1,2,3,... \}

3 0
4 years ago
Find the value of x.
umka2103 [35]

Answer:

Hey there!

3x-9=114

3x=123

x=41

Let me know if this helps :)

6 0
4 years ago
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