A sofa has 6 identical cushions. Each cushion is a cuboid 18 cm by 80 cm by 95 cm.
The cushions are covered with a protective spray.
The protective spray is in cans.
The label on each can has this information.

Spray in this can covers 4m?
80 cm
(a) Work out how many cans are needed to cover the 6 cushions with protective spray.

Also do question b

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

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation:

really your just stupid if you don't know this

step-by-step explanation: