Computers from a particular company are found to last on average for three years without any
hardware malfunction, with a standard deviation of two months. At least what percent of the
computers last between 30 months and 42 months?
Hints:
This is a Chebyshev problem because it doesn't say anything about normal distribution.
Step 1: Make sure everything is in the same unit. I suggest months.
Step 2: Find how many standard deviations from the mean 30 and 42 are.
Step 3: Substitute into Chebyshev's Theorem to find the percentage. (Hopefully you
remember and wrote down that k represents the number of standard deviations.)

the answer is 24

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

answer: none of these answers are correct only the second half is

step-by-step explanation:

answer: i think you should do the math and pay attention in class : )

step-by-step explanation:

that is truly what   think but if i get the answer i will