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Marysya12 [62]
2 years ago
15

A humidifier uses 30 gallons of water in 8 hours. If the total amount of water available is 45 gallons, how many gallons of wate

r would be left after 7 hours?
Mathematics
1 answer:
lutik1710 [3]2 years ago
3 0

Answer:

18.75  PLEASE GIVE BRAINLIEST

Step-by-step explanation:

8 hours = 30 gallons

30 ÷ 8 = 3.75 gallons of water used per hour

3.75 x 7 = 26.25 gallons used in 7 hours

45 - 26.25 = 18.75 gallons left after 7 hours

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A) she incorrectly determined the GCF.

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Andru [333]
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4 0
3 years ago
A ball is thrown from a height of 38 meters with an initial downward velocity of 3 m/s
ANTONII [103]
<h2>Hello!</h2>

The answer is:

The ball will hit the ground after t=2.47s

<h2>Why?</h2>

Since we are given a quadratic function, we can calculate the roots (zeroes) using the quadratic formula.  We must take into consideration that we are talking about time, it means that we should only consider positive values.

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\frac{-b+-\sqrt{b^{2} -4ac} }{2a}

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a=-5\\b=-3\\c=38

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Since negative time does not exists, the ball will hit the ground after:

t=2.473s=2.47s

Have a nice day!

4 0
3 years ago
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