After a long day at work, you come home to find that someone has come in and stolen several items in your home. Luckily, you have a security camera mounted in the kitchen and are lucky enough to live next door to a grocery store that has cameras outside that view the entire front side of your house. While watching the cameras, you find that one thief was a man and one was a woman. While the woman was in the kitchen, a motion light that was mounted on a wall shined down on her and cast a shadow that was the exact length as the width of the counter, which you measure to find is 5 feet wide. From watching the camera, you know the angle of elevation to the light is between (pi/4) and (4pi/15). When the thieves first got there, since it was nighttime, a ground mounted light automatically came on and shone on the man from an angle of elevation of (pi/5). When this happens, the man standing 1.2 feet from the door and cast a shadow on the house that perfectly lined up with the height of the door, which is 7 feet. The police have a list of 8 people who they think they could possibly have done it. The male heights and names are as follows. George is 5 ft 6 inches Bob is 5 ft 11 inches Terrance is 6 ft John is 6 ft 2 inches The female heights and names are as follows. Amanda is 5 ft 2 inches Karen is 5 ft 6 inches Alissa is 5 ft 7.5 inches Kyla is 6 ft  Who could it possibly have been?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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After a long day at work, you come home to find that someone has come in and stolen several items in your home. Luckily, you have a security camera mounted in the kitchen and are lucky enough to live next door to a grocery store that has cameras outside that view the entire front side of your house. While watching the cameras, you find that one thief was a man and one was a woman.

While the woman was in the kitchen, a motion light that was mounted on a wall shined down on her and cast a shadow that was the exact length as the width of the counter, which you measure to find is 5 feet wide. From watching the camera, you know the angle of elevation to the light is between (pi/4) and (4pi/15).

When the thieves first got there, since it was nighttime, a ground mounted light automatically came on and shone on the man from an angle of elevation of (pi/5). When this happens, the man standing 1.2 feet from the door and cast a shadow on the house that perfectly lined up with the height of the door, which is 7 feet.

The police have a list of 8 people who they think they could possibly have done it. The male heights and names are as follows.

George is 5 ft 6 inches

Bob is 5 ft 11 inches

Terrance is 6 ft

John is 6 ft 2 inches

The female heights and names are as follows.

Amanda is 5 ft 2 inches

Karen is 5 ft 6 inches

Alissa is 5 ft 7.5 inches

Kyla is 6 ft 

Who could it possibly have been?

Expert Solution
Step 1

Given, height of door is 7 ft

Let the height of thief is x feet.

Since, the man standing 1.2 feet from the door and cast a shadow on the house that perfectly lined up with the height of the door.

According to situation, figure is

Advanced Math homework question answer, step 1, image 1

Here AB is the door, which height is 7 ft.

BC is the  shadow of door.

DE height of thief is x feet. Thief is 1.2 ft away from door such that the shadow of thief and door in line.

ACB=π5=36°

 

 

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