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Nookie1986 [14]
3 years ago
14

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

eight of the airplane above ground after t seconds is given by the equation h=-16t^2+56t+1, where h is the height 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
Mathematics
2 answers:
morpeh [17]3 years ago
7 0

Answer:

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


nata0808 [166]3 years ago
3 0
For a vertical projectile, the equation of motion is expressed h(t)=g+bt+c, where g is gravity, b is the initial upward velocity, and c is the starting height. The maxima of this equation is given by -b/2g, which in this case would be -56/-32, or 1.75 seconds after launch
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The sale price of a pair of sneakers was $33.75. What is the discount % if the original cost is $75?
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Answer:

55%

Step-by-step explanation:

To find the percent discount

Take the original price and subtract the new price

75-33.75 =41.25

Divide this by the original price

41.25/75

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Multiply by 100

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Subtract 8 feet from 9 yards, 1 foot
Advocard [28]

Answer:

20 feet

Step-by-step explanation:

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Find the range of the function y=-x^2-3x when the domain is {-5, 0, 2}
ankoles [38]

The range of the function y = -x² - 3x when the domain is {-5,0,2} is:

{-10, 0}.

<h3>What is the range of a function?</h3>

The range of a function is the set that contains the output values for the given domain of the function.

In this problem, the domain is:

{-5,0,2}.

Hence the output values are:

  • -(-5)² - 3(-5) = -25 + 15 = -10.
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Hence the range is:

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More can be learned about the range of a function at brainly.com/question/10891721

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