According to the national sleep foundation in the year 2015 americans averaged 6.9 hours of sleep per night. in 1900 americans averaged 8 hours and 30 minutes of sleep per night. model this data by a linear equation and use it to predict the year when americans will not be sleeping at all.

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step-by-step explanation:

the factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24. hope this ! mark brainliest! you v much! : )

47 - 90 = 43

43 - 180 = x

x = 137

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step-by-step explanation:

a roof pitch is basically for every inch rise there is 12 inches run.

the height of the roof is also known as the rafter.

formula: rafter^2 = rise^2 + run^2

rafter^2 = 5^2 + 12^2

rafter^2 = 25 + 144

rafter ^2 = 169"^2

the height of the roof from the lowest point to the highest point is 169"^2.

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