Question

What is the area of the actual bathroom in square feet? Round your answer to the nearest whole number.

7 ft2
19 ft2
12 ft2
140 ft2

Answer 1

@freckles please help me :)

Answer 2

the bathroom is a rectangle it looks like
the area of a rectangle in the picture is a*b
but it says the scale is 1:20
so the actual area of the bathroom is 20*a*b

Answer 3

oh so then i multiply and get the answer?

Answer 4

a and b are to be replaced by 2 and 3.5

Answer 5

well and multiply the area of the rectangle in the picture by 20

Answer 6

oh so then the answer is 140ft2

Answer 7

correct?

Answer 8

well not so fast

Answer 9

the units in the picture are inches

Answer 10

so we have 140 inches squared

Answer 11

oh... :)

Answer 12

we need to convert the inches square part into feet squared

Answer 13

since all the choices are given in the feet squared units

Answer 14

its 11.66 but we round it to 12, right?

Answer 15

i looked that part up in a calculator ;0

Answer 16

\[140 \text{ inches }^2=140 (\frac{1}{12} \text{ feet })^2 =140 \frac{1}{144} \text{ feet } ^2=\frac{140}{144} ft^2\]
I wonder if the choices have the wrong units

Answer 17

i dont know, i just copied and pasted the question...

Answer 18

i think the answer is c... 122

Answer 19

12 ft2*

Answer 20

1 foot =12 inches
1/12 foot =1 inch
1 inch=1/12 foot

multiply both sides by 3.5 gives 3.5 inch=3.5/12 foot
multiply both sides by 2 instead gives 2 inch 2/12 foot
So we have
the area in the picture is \[\frac{3.5}{12} ft \cdot \frac{2}{12} ft =\frac{7}{144} ft ^2 \\ \text{ multiplying by 20 gives } \frac{140}{144} ft^2=\frac{35}{36} ft^2\]
I think there is a mistake..
because this is none of the answers
If we had pretended the units in the picture were in feet then D would be the answer

Answer 21

but if we don't pretend that part then none of these are the answers

Answer 22

but... the calculator said that if we converted the 140 inches into feet then it would be 11.66. And the question says to round so then wouldn't the answer be 12ft2?

Answer 23

are you converting 140 inches^2?
140 inches=140/12 feet which would be approximately 12 feet

140 inches^2=140/12^2 ft^2

Answer 24

you can't pretend inches^2 is the same as inches

Answer 25

oh..

Answer 26

http://www.wolframalpha.com/input/?i=140+inches%5E2+%3D%3F

Answer 27

35/36=.9722

Answer 28

oh, so then what should i put?

Answer 29

well if you can put none of these that would be correct

Answer 30

if you pretend the units in the picture are feet instead of inches then your answer is D

Answer 31

ok:P there must be a mistake in the picture then. thanks sooo much! i gave you a medal and i became your fan

Answer 32

wrong, i just submitted the test

Answer 33

if you can let your teacher know that there is mistake in units on the picture for this question

Answer 34

oh well :( nah ill reset it thx anyway:)

Answer 35

and how do i solve this one?

Answer 36

? * 5.5 * 3

Answer 37

same way 3 in*5.5 in*30

Answer 38

30 * 5.5 * 3?

Answer 39

yep that will be in in^2

Answer 40

since in*in=in^2

Answer 41

and this one?

Answer 42

enlarge by a scale of 1.50

Answer 43

find the area of the rectangle and multiply the result by what is it being scaled by

Answer 44

whats the total area in feet

Answer 45

oh..

Answer 46

it is the same as the previous questions

Answer 47

except this one is in feet

Answer 48

so your unit measurement will be feet squared

Answer 49

for the area that is

Answer 50

yeah. thanks a lot freckles :)

Answer 51

np