Josie spots her brother Dan from the roof of a block of flats. The angle of depression from Josie to Dan is 45°
The distance from Josie directly to Dan is 80 metres.
Calculate the height of the block of flats.
Give your answer correct to 2 decimal places.

b

step-by-step explanation:

hello,

as we don't know if g(x) is continue,

answer b

f(x)=2x²-8x+1=2(x²-4x+4)+1-8=2(x-2)²-7

vertex is (2,-7) ( a minimum since coefficient of x² is > 0)

just go here

its what i use

step-by-step explanation:

the answer is 0.8in^2

hope you get it down chief.