Alaptop company claims up to 11.0 hours of wireless web usage for its newest laptop battery life. however, reviews on this laptop shows many complaints about low battery life. a survey on battery life reported by customers shows that it follows a normal distribution with mean 10.5 hours and standard deviation 27 minutes. (a) what is the probability that the battery life is at least 11.0 hours? round your answer to four decimal places (e. g. 98.7654) (b) what is the probability that the battery life is less than 10.0 hours? round your answer to four decimal places (e. g.98.7654) (c) what is the time of use that is exceeded with probability 0.97 round your answer to two decimal places (e. g. 98.76). the time of use that is exceeded with probability 0.9 is

Step-by-step explanation:

given that a  laptop company claims up to 11.0 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 10.5 hours and standard deviation 27 minutes.

convert into same units into hours.

X is N(10.5, 0.45)

a)  the probability that the battery life is at least 11.0 hours

(b)  the probability that the battery life is less than 10.0 hours

=

(c)  the time of use that is exceeded with probability 0.97

=97th percentile

= 11.844

d)  The time of use that is exceeded with probability 0.9 is

is 90th percentile = 10.885

$3,200 x 7.25% = $3,200 x .0725 = $232 interest monthly

$232 monthly x 12 annual = $2, 784

step-by-step explanation:

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.