Question

You live near a bridge that goes over a river. The underside of the bridge is an arch that can be modeled with the function y = –0.000475x2 + 0.851x, where x and y are in feet. How high above the river is the bridge (the top of the arch)? How long is the section of bridge above the arch?

A. The bridge is about 1,791.58 ft. above the river, and the length of the bridge above the arch is about 381.16 ft.

B. The bridge is about 1,791.58 ft. above the river, and the length of the bridge above the arch is about 895.79 ft.

C. The bridge is about 381.16 ft. above the river, and the len

Answer 1

CAN SOMEBODY HELP ME

Answer 2

@austinL

Answer 3

Type it into your calculator. Make your window
xmin 0
xmax 2000
ymin 0
ymax 1000

Then find the max of the graph. :)

Answer 4

im sorry I have my TI-30x calculator now

Answer 5

um...... one sec :)

Answer 6

ok

Answer 7

http://www.wolframalpha.com/input/?i=%E2%80%930.000475x2+%2B+0.851x

Answer 8

b

Answer 9

I would say so :)