The number of hours that 20 people spent watching television per day, in relation to age, is graphed. This quadratic equation represents the model for the set of data. y = 0.004x^2 - 0.314x + 7.5 Based on the model, approximately how much time does an 18-year-old spend watching television each day?

A. 2 hours

B. 3 hours

C. 7.5 hours

D. 0.5 hours

54

step-by-step explanation:

6x9

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

804.75

step-by-step explanation:

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet