Question

Can someone please check my work?

Answer 1

These are the directions for the assignment:


For this assignment, you will be finding the surface area and the volume of three different spherical
objects. You will need to find three objects and measure the distance around the center using a ruler or
tape measure. Show all work!
Step 1: Find 3 spherical objects around your house. These can be anything from a ball to candle (Be
creative!!). Try to pick a variety of sizes.
Step 2: Sketch each figure and label the distance around the center (This is the circumference of the
largest circular cross section of the sphere). Label with appropriate units.
Step 3: The measurement you just found is the circumference. Calculate the radius of the sphere.
Step 4: Find the surface area of each object. Show all work and label your answers appropriately.
Step 5: Find the volume of each object. Show all work and label your answers appropriately.
Step 6: Submit all work, sketches and answers

Answer 2

Here is my work. Can you please check if it's correct?

Answer 3

@Loser66 @welshfella

Answer 4

yup for the first attachment

Answer 5

the second attachment: redo, please

Answer 6

Redo? Do you mean attach it again or is something incorrect?

Answer 7

the radius part

Answer 8

10/2pi= 1.59

Answer 9

the first attachment, you are correct for radius, but the S = 4pi r^2 = 4*pi*(9.54)^2=1143.68

Answer 10

calculation check!!

Answer 11

OK, here's my corrected second one.

Answer 12

For the first one, did you see that I wrote the surface area 364.0464pi ?

Notice the pi at the end? I wanted to keep the answer exact. :)

Answer 13

hey, you miss pi, right?
4pi (1.59)^2 = 31.769
4*(1.59)^2 = 10.1124

Answer 14

oh, I see!! my bad

Answer 15

Ok. then you are good

Answer 16

You think you could check the third one too? :)

Answer 17

(0.63)^2= 0.405

Answer 18

That's not what I got on the calculator........... (0.63)^2 = 0.3969

Answer 19

https://www.google.com/#q=calculator

Answer 20

I don't know!!

Answer 21

I take (2/pi)^2

Answer 22

Same answer on google calc: (0.63)^2 = 0.3969

Answer 23

see my capture?

Answer 24

oh, because it is sensitive case!!

Answer 25

if you round them, you have (0.64) ^2=4.096
if you don't round them, you need take exactly the number (0.6366197724)^2 = 0.40526

Answer 26

Oh, ok.