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Mathematics 7 Online
zarkam21:

Help

zarkam21:

1 attachment
Vocaloid:

first plug the initial velocity and height into the equation, then find the axis of symmetry using x = -b/(2a)

zarkam21:

so -16+110

Vocaloid:

so the equation becomes -16t^2 + 110t + 2

zarkam21:

+2

Vocaloid:

a = -16 b = 110 find -b / (2a)

zarkam21:

-110 / (2*-16)

Vocaloid:

good now simplify that (you can leave it as a fraction)

zarkam21:

-110/-32

Vocaloid:

good, and that ends up being 55/16 now let t = (55/16) and find the height

Vocaloid:

(you can just use a calculator for this)

zarkam21:

so it would be -16(55/16)^2 + 110(55/16) + 2

Vocaloid:

yup

zarkam21:

191.1

Vocaloid:

i end up getting 3057/16 which rounds to 191.06 = your ans

Vocaloid:

(they want it to the nearest hundredth so it rounds to .06)

zarkam21:

i round to the hundredth

zarkam21:

righ tthanks =)

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