Mathematics, 05.04.2021 14:00 riplilsnupe023
A certain brand of flood lamps has a lifetime that is normally distributed with a mean
of 3,750 hours and a standard deviation of 300 hours.
(a) What proportion of these lamps will last for at least 4,000 hours?
(b) What proportion of these lamps will last between 3,600 and 4,000 hours?
(c) What proportion of these lamps will last less than 3,800?
Answers: 2
Mathematics, 21.06.2019 14:30
Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?
Answers: 1
Mathematics, 21.06.2019 15:00
Asmall foreign car gete 42 miles per gallon and user 35 gallons on a trip.gasoline costs $1.05 per gallon.what was the cost of gasoline per mile driver?
Answers: 3
Mathematics, 21.06.2019 18:30
Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3
Answers: 2
A certain brand of flood lamps has a lifetime that is normally distributed with a mean
of 3,750 hou...
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