Rounding to the nearest whole number

c= 61m

Step-by-step explanation:

using Pythagoras theorem, sin33°=a/c

sin33°=33/c

using tables, sin33°=0.5446

substituting,

0.5446=33/c

cross multiply

0.5446*c=33

divide both sides by 0.5446

c=33/0.5446

c=60.5949321

c=61m (to the nearest whole number)

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

the balance is found at the link

step-by-step explanation: