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antiseptic1488 [7]
3 years ago
14

The time in seconds, t, it takes for a specific object being dropped from a particular height in feet above sea level, h, to rea

ch the ground can be found by the radical function t equals one fourth times radical h period At what height should you drop an object in order for it to reach the ground in 8 seconds?
1,024 feet
256 feet
64 feet
4 feet
Mathematics
1 answer:
nadezda [96]3 years ago
7 0

Applying the function, it is found that the object was dropped from a height of 256 feet.

--------------------

The time it takes for the object to hit the ground is given by:

t(h) = \sqrt{\frac{h}{4}}

--------------------

  • It took 8 seconds to hit the ground, thus, t = 8, and we have to <u>solve for the height h.</u>

t(h) = \sqrt{\frac{h}{4}}

8 = \sqrt{\frac{h}{4}}

(\sqrt{\frac{h}{4}})^2 = 8^2

\frac{h}{4} = 64

h = 4(64) = 256

The object was dropped from a height of 256 feet.

A similar problem is given at brainly.com/question/22277316

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WILL MARK BRAINLEIST
lina2011 [118]

Answer:

decrease by 50%

Step-by-step explanation:

\frac{0.4x}{0.8y} =\frac{x}{2y}      

Decreased by 60% = (100%-60%)x = 0.4x.

Decreased by 20% = (100%-20%)x = 0.8x.

\frac{x}{y} initial fraction, and we can see that denominator will increase 2 times, so fraction will decrease 2 times, or decrease by 50%.

6 0
3 years ago
A rectangle has an area of x square units. The rectangle is dilated to create a new rectangle with an area of 9x square units. D
Alika [10]
The reactangle has an area of x.

So that means two numbers multiplied to each other equal to x. We can just think of itwo numbers that when multiplied equal to x as a and b. 

So that means the side lengths are <u />a and b. And ab = x (will be using this right next).

And it was multiplied by some scale factor that made the new area 9x. So if the scale factor is y, then:

(y\times a)\times (y\times b)=9x
y^2ab=9x
y^2x=9x
y=3

y can not equal to -3, because the length of a side of any polygon can never be negative.

So the dilation is 3.

And so if the dimension is 5 by 8.

Then the area is 5 \times 8=40

And so then x=40

And then after the dilation, it would be 9x=9(40) = 360

We could check it another way too. Since we said the scale factor is 3, then:

( 5 \times 3) \times (8 \times 3) = 15 \times 24 = 360

So basically 15 by 24 is the new dimensions :)

6 0
3 years ago
Sherry has $25 on her eTuns gift card. If she buys songs at $0.50 each, and has $16.50 remaining on the card, how many songs did
meriva

Answer:

17

Step-by-step explanation:

$25.00 - $16.50 = $8.50

$8.50 / $0.50 = 17

7 0
3 years ago
Solve for z.<br><br> –2.9 + 4.2z = –14.73 − 12.74 + 0.3z<br><br> z =
Kobotan [32]

Answer:

\boxed{z = -6.3}

Step-by-step explanation:

=  >  - 2.9 + 4.2z =  - 14.73 - 12.74 + 0.3z \\  \\  =  >  - 2.9 + 4.2z =  - 27.47 + 0.3z \\  \\  =  > 4.2z - 2.9 =  0.3z - 27.47 \\  \\  =  > 4.2z - 0.3z - 2.9 =  - 27.47 \\  \\  =  > 3.9z =  - 27.47 + 2.9 \\  \\  =  > 3.9z =  - 24.57 \\  \\  =  > z =  -  \frac{24.57}{3.9}  \\  \\  =  > z =  - 6.3

4 0
3 years ago
Answer to this question
seropon [69]
The answer is A hope this helps
4 0
4 years ago
Read 2 more answers
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