2 years ago

PLS HELP ME THIS IS HARDD

Mathematics

1 answer:

pogonyaev2 years ago

6 0

Answer:

it would be the second answer because the shape has to get 3/4 smaller than the pre-image

Step-by-step explanation:

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A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by th

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Answer:

t = 15.42 s

Step-by-step explanation:

A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation.

$y=-16x^2+242x+73$

We ned to find the time when the rocket will the ground. For this, y = 0

$-16x^2+242x+73=0$

It is a quadratic equation whose solution is given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Here, a = -16, b = 242 and c = 73

$x=\dfrac{-b+ \sqrt{b^2-4ac} }{2a}, x=\dfrac{-b-\sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-242+ \sqrt{(242)^2-4(-16)(73)} }{2(-16)}, x=\dfrac{-242- \sqrt{(242)^2-4(-16)(73)} }{2(-16)}\\\\=-0.295\ s, 15.42\ s$

Neglecting negative value.

So, it will hit the ground in 15.42 s.

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2 years ago

the cost of a candle varies directly with the volume of a candle. if a candle with a volume of 80cm^3 costs $12, what would be t

a_sh-v [17]

$120 \div 8. = 1.5$

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the answer is $18

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2 years ago

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Step-by-step explanation:

14 x 2 + 14 = 42

42 + 14 = 56

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Step-by-step explanation:

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