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vlabodo [156]
3 years ago
7

The ball's height (in meters above the ground), xxx seconds after Antoine threw it, is modeled by: h(x)=-2x^2+4x+16 How many sec

onds after being thrown will the ball hit the ground? seconds
Mathematics
2 answers:
zlopas [31]3 years ago
5 0

Answer:

Step-by-step explanation:

If we are given the quadratic model, we know that the height of anything on the ground is 0 meters, so that model becomes

0=-2t^2+4t+16 I changed your x's to t's since t is for time.

Now we need to factor that quadratic and solve for time:

0=-2(t^2-2t-8)

Since -2 definitely does not equal 0, then

t^2-2t-8=0

Factor that and find t values of 4 and -2.  Again, we know that time will never be negative, so

t = 4 seconds.

stiks02 [169]3 years ago
3 0

Answer:

Answer is 16. Not 4.

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Is my answer correct?<br> Will give brainliest!!
Helen [10]
Yes your answer is correct

8 0
3 years ago
A sphere and a cylinder have the same radius and height. The volume of the cylinder is 11 feet cubed.
asambeis [7]

9514 1404 393

Answer:

  V = (2/3)(11)

Step-by-step explanation:

The given cylinder has a height of 2r, so its volume is ...

  V = πr²(2r) = 2πr³

The volume of a sphere is given by ...

  V = 4/3πr³

Then the ratio of the volume of the sphere to the volume of the cylinder is ...

  (4/3πr³)/(2πr³) = (4/3)/2 = 2/3

So, the volume of the sphere is 2/3 times the volume of the cylinder:

  V = (2/3)(11)

4 0
3 years ago
Read 2 more answers
Coral buys a house for £234 900 she pays a 10% deposit. Work out the amount of deposit paid by Carol.
Pavel [41]

The solution would be like this for this specific problem:

Given:

Total amount of the house = £234,900

 

<span>Find:

Amount of deposit paid = ?</span>

 

So first, we divide the t<span>otal amount of the house by the percent of deposit that Carol paid.

</span>= £234,900 / 10%

= £23,490

 

<span>Another way to solve this is by converting the percent of the deposit into a decimal. We do this by dividing the percentage amount by 100.

= 10% / 100% </span>

= 0.1

 

Next, we multiply the decimal equivalent of the percentage to the total amount of the house.

= £234,900 * 0.1

= £23,490

 

So, the amount of deposit that was paid by Carol is £<span>23,490.</span>

6 0
3 years ago
Answer the value of x
GalinKa [24]

Answer:

Step-by-step explanation:

(8-2)*180=1080 degrees

114+66+94+259+94+67+254+97+x=1080

1045+x=1080

1080-1045=x

x=35

4 0
2 years ago
Help please thank you
Pavel [41]
9: v=-2
X= 0
K=3

I hope this helps
4 0
3 years ago
Read 2 more answers
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