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motikmotik
3 years ago
15

Yolanda purchased a prepaid phone card for $20. Long distance calls cost 14 cents a minute using this card. Yolanda used her car

d only once to make a long distance call. If the remaining credit on her card is $14.12, how many minutes did her call last?
Mathematics
1 answer:
grigory [225]3 years ago
6 0
42 minutes is the answer I think


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The diagonal measurement of a tv screen is 42 inches. The base is 38 inches wide. How tall is the tv?
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Given:

Diagonal measurement of a tv screen = 42 inches.

Base = 38 inches

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The height of the tv.

Solution:

Let h be the length of the tv.

According to the Pythagoras theorem,

hypotenuse^2=base^2+perpendicular^2

(42)^2=(38)^2+(h)^2

1764=1444+(h)^2

1764-1444=(h)^2

Taking square root on both sides.

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\sqrt{64\times 5}=h

8\sqrt{5}=h

Therefore, the height of the tv is 8\sqrt{5} inches.

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