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PolarNik [594]
3 years ago
6

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The h

ight of the airplane above ground after t seconds is given by the equation h=-16t^2+56t+1 where h is the hight of the airplane in feet and t is the time in seconds after it is launched. Approximately how long does it take the airplane to reach its maximum height?
A)0.3 seconds
B)1.8 seconds
C)3.5 seconds
D)6.9 seconds
Please Help
Mathematics
2 answers:
docker41 [41]3 years ago
8 0

Answer:

The correct answer is B. 1.8 seconds. I just took the test!


Law Incorporation [45]3 years ago
4 0
H=-16t^2+56t+1, the airplane is shot up from a platform 1 foot above the ground, so 1= - 16t^2+56t+1, we solve this equation
(- 16t+56)t=0, (- 16t+56)=0 or t=o, - 16t+56=0, implies t =3.5s
so the answer is C)3.5 seconds 
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The volume of seeds in the package must be equal to the volume of the feeder in order to fill it completely. The volume of the conic feeder is given by:
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Equating the two and substituting values:
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3 0
3 years ago
Triangle abc is located on a coordinate plane angle c is at (1,2) the triangle is rotated counter clockwise 90° about the origin
sertanlavr [38]

After rotating a point C 90° counterclockwise about the origin the coordinates of C' would be (-2, 1)

In this question, we have been given a triangle ABC.

A point C is at (1, 2)

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We need to find the coordinates of C' which is image of vertex C  after rotation.

We know that, if we rotate a point 90° counterclockwise about the origin a point (x, y) becomes (-y, x).

Here C(1, 2) is rotated 90 degrees counterclockwise about the origin.

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C' = (-2, 1)

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6 0
1 year ago
It’s due late tonight can some pls help me pass
miskamm [114]
Answer: C
The x row goes up every time by two and the y decreases by 4.
6-4=2 ect...
MARK THE BEST PLZ!!
4 0
3 years ago
. help needed please​
Anastasy [175]
In order to do this, we would use order of operations. First, Parentheses, which is division with fractions, so we would do KCF,keep it, change it, flip it. keep the first fraction, change the operation to multiplication, then flip the next fraction, making it -7/9 x 3/1. the answer would be -2.33. multiply that by -2, and you would get -4.66, which is your answer. PLEASE MARK BRAINLIEST IF HELPFUL! :))
5 0
3 years ago
trans.phobic, homo.phobic, white and thinks you can be rac.ist to white people, also says the r sl.ur what else can you do wrong
almond37 [142]

seems like you need to go to therapy for this one.

8 0
2 years ago
Read 2 more answers
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