Answer:
Perimeter = 46.6 m
Area = 78.36 m²
Step-by-step explanation:
Perimeter is just the outsides, so add 3.7 + 12.3 + 4.5 +11 AND the sides you aren't given. To find them, you do 11-3.7 = 7.3 and 12.3-4.5 = 7.8. So you add 3.7 + 12.3 + 4.5 + 11 + 7.3 + 7.8 = 46.6
Area is the inside, so you multiply length by width. You can split it different ways, but I multiplied by 3.7*12.3 first, giving 45.51. Now to find the area of the other box, you need to subtract 11 by 3.7, which we saw was 7.3. Now we can multiply 7.3 by 4.5, which is 32.85. Then you add 45.51 and 32.85 to get 78.36.
The side length of a square is the square root of the area:
Side length = √49 = 7 feet.
The perimeter of a square is 4s = 4*7 = 28 feet.
So you need 46 which means that you can’t have less than 46 otherwise you won’t have enough
46/10 = 4 packs + 6 more plates
If you only buy 4 packs you will have 40 plates but you need 46 so buy an extra pack.
So you will need to buy 5 packs of plates.
I hope this helps :)