Question
A new cellular phone tower services all phones within a 20 mile radius. Doreen lives 16 miles east and 12
miles south of the tower. Is she within the area serviced by the tower? Complete the explanation.
The range of the tower can be modeled by a circle with a radius of and a center at the origin. The
equation of the circle is x2 + y2 = 202 = 400. Doreen lives at the point (
), which (select)
on the circle: 162 + (12)2 = 256 + 144 (select) 400. Therefore, Doreen (select) in the area serviced
by the tower

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

your answer is a

step-by-step explanation:

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d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40