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eduard
3 years ago
7

A pebble drops from a balcony that is 160 feet above the ground. The pebble lands on the top of a sign that is 16 feet high. The

function y=160-16t^2 represents the height y (in feet) of the pebble t seconds after dropping from the balcony. How many seconds does the pebble drop before hitting the sign?
Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
7 0

Answer:

3 seconds

Step-by-step explanation:

16 = 160 - 16t²

16t² = 144

t² = 9

t = 3

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4 years ago
Identify the indicated element
timurjin [86]
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4 years ago
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Step-by-step explanation:

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3 years ago
During their summer break from school. Hortencia and Alex decide to paint houses to earn money. Hortencia charges a flat rate of
PIT_PIT [208]

Answer:

The answer to your question is: 20 hours.

Step-by-step explanation:

Data

Hortencia = $350

Alex $18 / h

# hours Alex must paint to make more money than Hortencia = ?

Process

Equation                      18 x n > 350

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If Alex work 19.4 hours, he will make the same amount of money than Hortencia, then He needs to work 20 hours.

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3 years ago
Which expression is
Aleonysh [2.5K]

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