Question

A post is 9 ft from one wall of a room and 40 ft from the wall at right angle to it. How many ft is it from the intersection of the two walls?

Answer 1

Let one wall be the x-axis and let the other wall be the y-axis.
The post is at \((4,9)\), the intersection of the walls is \((0,0)\)
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Distance from (0,0) to (4,9):
\[d = \sqrt{4^2+9^2}= \sqrt{16+36}= \sqrt{52} ft\]

Answer 2

Choices:
a. 7
b. 21
c. 41
d. 49

Answer 3

Can you use a calculator?

Answer 4

Yup

Answer 5

Aah, okay. Thank You :D

Answer 6

Wait

Answer 7

The post is at (40,9), the intersection of the walls is (0,0)
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Distance from (0,0) to (40,9):
\[d = \sqrt{40^2+9^2}= \sqrt{1600+81}= 41 ft\]

Answer 8

Yeah, that's what i mean.

Answer 9

Okay, that's done