Watch Out! Inc., a consumer organization wants to estimate the life of Extra-Strong light bulbs. With 35 randomly purchased bulbs, they find the mean life to be 998 hours, with standard deviation of 30 hours. Construct a 90% confidence interval for the mean life of bulbs. Interpret your result.

the answer is d. 75%

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation: