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2 years ago

8

The average life of a lightbulb is 2500 h, with a standard deviation of 200 h. Suppose that 10,000 bulbs are purchased to equip

a new building. Assume that the lives are normally distributed. How many of the light bulbs would be expected to burn out after just 1800 h?

1 answer:

Anna35 [415]2 years ago

4 0

0 lightbulbs would be expected to burn out in 1800 hours

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15. The height and yolume of a cylinder are 4cm and 616cm respectively. Calculate the diameter of the base. (take t = 27 쪽 A. 7c

irakobra [83]

Step-by-step explanation:

Given that,

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To find,

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Firstly we'll find the base radius of the cylinder.

$\longmapsto\rm{V_{(Cylinder)} = \pi r^2h}\\$

<u>Accordi</u><u>ng</u><u> </u><u>to</u><u> </u><u>the</u><u> </u><u>qu</u><u>estion</u><u>,</u>

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Now,

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