# math

posted by .

On a set of bluepints the scale is half an inch=4feet
Find the actual lengthof a room that measures 2.8 inches on the blueprint

• math -

How many half inches are in 2.8 inches? that is how many 4 feet are in the room.

Feet in Room=4* 2.8/.5

check my thinking.

• math -

16.8*2.8=47.04/5=9.4

• math -

How can the room be only 9.4 feet, when 1 inch = 8 feet?

• math -

I set up another porportion and cross multiplied, and i got what you told me...
8ft over 1in = x over 2.8 and I crossed multiplied to get 22.4

• math -

Set up a proportion.

0.5 / 4 = 2.8 / x

Cross multiply.

0.5x = 4 * 2.8
0.5x = 11.2
x = 22.4

## Similar Questions

1. ### 7th grade math help 2 question

#11 The coordinate of rectangle ABCD are given. Find the coordinates of its image after a dilation with the scale factor of 2. * A (2,4) B (-3, -1) C (0,9) D (6,-4) #10 On a blueprint, 1 inch = 13 feet. If the dimensions of the playroom …
2. ### Algebra.... SOMEONE HELP ME!!!!

A rectangular room on a blueprint is 2 inches wide and 5 inches long. If the scale of the blueprint to the actual room is 1:72, what is the width of the room?
3. ### Algebra 1

a scale drawing for a new city library shows a rectangular children's reading room with a length of 5 1/4 inches and a width of 3 1/2 inches. The scale on the is 1 inch:4feet . What will be the actual length and with of the room when …
4. ### math

hey everyone can you guys please answer these 5 questions or 3 or 2 how many you want to answer I just need answers for these last 5 since I did the rest and thanks to you all because I do appreciate this. 1.The length of the driveway …
5. ### math(CHECK ASNWERS)

PLEASE CHECK MY ANWERS THANKS 1.The length of the driveway shown on a blueprint is 2 inches. If the actual length of the driveway is 20 feet, what is the scale of the blueprint?
6. ### algebra and geometry

On a floor plan, a room measures 2 inches by 5 inches. If the scale is 1 inch =4 feet, what is the actual size of the room?
7. ### Math

1. Write the ratio in the simplest form. 50:10 (a) 25:5 (b) 10:2 (C) 5:1* (D) 1:5 2. Solve the following proportion. p/6=7/8 (a) p=5.25 (b) p=8 (c) p=10.5* (d) p=42 3. Chris's uncle has a model car. The model is 6 inches long and 3 …
8. ### MATH MS. SUE

1. The length of a piece of paper is 8.5 inches. Using scissors, you reduce the length of the paper to 4.25 inches. What is the scale factor of the dilation?
9. ### Math

On a given blueprint, 1 inch = 12 feet. If the dimensions of a recreation room on the blueprint are 2 inches × 1.75 inches, what are its actual measurements?
10. ### Math

On a given blueprint, 1 inch = 30 feet. If the dimensions of a meeting room on the blueprint are 1.5 inches x 1.25 inches, what are its actual measurements?

More Similar Questions