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Nadya [2.5K]
3 years ago
9

The path of firework is modelled using the equation h= -5d2+20d+1 what is the maximun height?

Mathematics
1 answer:
ohaa [14]3 years ago
8 0
h=-5d^2+20d+1\\h'=-10d^2+20d=0\\-10d(d-2)=0\\d=0,2\\\\h=-5(2)^2+20(2)+1\\h=-5(4)+40+1\\h=-20+41\\h=21

21 units
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Please help! Thank you so much!
igor_vitrenko [27]

Angle W:

180 = 90 + 57 + W

180 = 147 + W

W = 33 degrees

Using trigonometry functions to find the side lengths. (SOH CAH TOA)

Side XZ:

cos(57) = XZ / 18

XZ = cos(57) x 18

XZ = 9.8 units

Side XW:

sin(57) = XW / 18

XW = sin(57) x 18

XW = 15.1 units

Hope this helps!! :)

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stepladder [879]
The answer would be -15
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2a+4(7+5a)I need help
kolezko [41]

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6 0
3 years ago
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A slug travels 3 centimeters in 3 seconds. A snail travels 6 centimeters in 6 seconds Both travel at constant speeds. Mai says,
Mashutka [201]

Answer:

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Step-by-step explanation:

Given that:

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4 0
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Which fraction has a value that's equal to 3⁄4?
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6 0
3 years ago
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