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3 years ago

A) Is {a, e,i,o,u} a subset of {a,b,c,d,e,f,g,h,i) Why?

Mathematics

2 answers:

kozerog [31]3 years ago

8 0

Answer:

Step-by-step explanation:

u and o arent elements of {a, b, c, d, e, f, g, h, i}

beks73 [17]3 years ago

3 0

Answer:

{a,e,i ,o,u} isn't subset of is this one. And this is the correct way { a,b,c,d,e,f,g,h,i...}

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Read 2 more answers

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denpristay [2]

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3 years ago

A rubber ball is dropped from the top of a hole. Exactly 20 seconds later, the sound of the rubber ball hitting bottom is heard.

gayaneshka [121]

9514 1404 393

Answer:

4192.9 ft

Step-by-step explanation:

We assume your falling-distance formula is supposed to be ...

s = 16t²

So, the time required to fall distance s is ...

t = √(s/16) = (1/4)√s

The time required for sound to travel distance s is ...

s = 1100t

t = s/1100

Then the sum of the time for the ball to fall and the time for the sound to travel back is ...

(1/4)√s + s/1100 = 20

275√s = 22000 -s . . . . . multiply by 1100 and subtract s

75625s = s^2 -44000s +484,000,000 . . . square both sides

s^2 -119,625s +484,000,000 = 0 . . . . put in standard form

s ≈ (1/2)(119,625 ±√12,374,140,625) = {4192.943, 115432.057}

Only the smaller of these two solutions makes any sense in this problem.

The hole is about 4192.9 feet deep.

_____

Additional comment

The distance equation for the falling object presumes a vacuum. The sound transmission presumes the presence of air, so the question setup is self-contradictory.

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3 years ago

Find the value of x. 7 Х 3 Z x= [?] V Give your answer in simplest form.

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Answer:

Step-by-step explanation:

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3 years ago

A) Is {a, e,i,o,u} a subset of {a,b,c,d,e,f,g,h,i) Why?​

A) Is {a, e,i,o,u} a subset of {a,b,c,d,e,f,g,h,i) Why?