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mafiozo [28]
3 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?
Mathematics
1 answer:
Anna35 [415]3 years ago
4 0
0 lightbulbs would be expected to burn out in 1800 hours
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A shopkeeper sold a table for Rs 2400, he loses 6% of its cost price.find the cost price of the table.
egoroff_w [7]

Answer:

Table price  is Rs 2544

Step-by-step explanation:

Table sold =  Rs 2400

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Now find  6% of 2400

     ( 2400 × 6 ) ÷ 100 =  144

Add this answer to table price sold

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Given that the arc length is 4.189 cm and the radius is 3 cm, the size of the arc will found as follows;
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suppose:
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