Arectangle is 9 ft long and 40 in. wide. what is its area in square feet? (note: 1 ft = 12 in.)
30 ft2
36 ft2
98 ft2
360 ft2

first option

Step-by-step explanation:

Let's make the following conversion:

40 inches to feet (Knowing that 1 feet=12 inches):

The formula for calculate the are of  a rectangle is:

Where l is the lenght and w is the width.

Therefore, when you substitute values, you obtain the following result:

The correct answer is first option 30 ft²

Step-by-step explanation:

Formula:-

Area of rectangle = l x b

l - Length of rectangle

b - Breadth of rectangle

It is given that,A rectangle is 9 ft long and 40 in

To find the area

here l = 9 ft

b = 40 in = 40/12 ft

Area = l x b = 9 x (40/12) = 30 ft²

Area of rectangle =  30 ft²

The correct answer is first option  30 ft²

the correct answer is d

hope this

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional