10 answer immediately!

1. what does it mean for the ratio of surface area to volume to be small or large? which ratios are better economically?

2. khianna says that she found a shortcut to calculate the surface area to volume ratio.

here are her steps:
1. add the radius and height.
2. multiply the radius and height.
3. divide the result from step 1 by the result in step 2.
4. multiply the result from step 3 by 2.

evaluate this process. does it seem to work? would it work for all 3-d figures? how does this method compare to the method you used?

1. When the ratio of surface area is small, it means that a small covering or container is needed to hold that volume while a big ratio means a large covering or container is needed to hold that same volume. The small ratio is better economically because it saves packaging costs and saves materials.

2.  process doesn't work in which in step 3 she divided step 1 by step 2 then multiplied the result by step 2 in which leaves us with just step 1. Since, step 1 is just a sum, it's not a ratio and therefore the method does not work at all. It wouldn't work for any 3D figures since it doesn't work but it wouldn't work for 3D figures that are not spheres, cones, and cylinders especially as they don't have radii. Her method compared to my method is just a no brainer as me method actually works.

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.