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Olin [163]
3 years ago
5

Marcos drops a bouncy ball from a hieght of 40 feet. The ball loses 10% of its maximum height on each bounce. How high will it b

ounce after 9 bounces?
Mathematics
1 answer:
iren [92.7K]3 years ago
4 0
I think after the 9th bounce it will lose 90% of its max height 

times 40 by 0.9 which will give you 36 
then take 36 away from 40 leaving you with 4. 


answer = 4ft 
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Answers:

Gabe needs 30 liters of the 50% solution

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Both answers are 30

==================================

Explanation:

We have two beakers, each of which we don't know how much is inside. Let's call this x and y

x = amount of liquid in the first beaker (water+acid)

y = amount of liquid in the second beaker (water+acid)

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We want this to be equal to 0.6 because Gabe wants a 60% solution when everything is said and done, so

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0.5x+0.7( y ) = 36

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0.5x+0.7(60)+0.7(-x) = 36 .... distribute

0.5x+42-0.7x = 36

-0.2x+42 = 36

-0.2x = 36-42 .... subtract 42 from both sides

-0.2x = -6

x = -6/(-0.2) .... divide both sides by -0.2

x = 30

He needs 30 liters of the 50% solution

Use this x value to find y

y = 60-x

y = 60-30

y = 30

So he needs 30 liters of the 70% solution


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