At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions.

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions

and this

so i have to divide 1.8 by 2

correct because radius is half the diameter

i got 0.9

now substitute that in for r in SA formula

ok i am doing it right now

i did the volume then i got 0.972pi

correct for volume
i thought we were doing surface area

yea but my homework say to find both of them

oh ok
what would SA be then

3.24pi

what do you mean?

i find the volume is 1152pi

correct

SA is 432pi right?

no i get 288pi
SA = 4pi*12^2 = 4pi*144 = 576pi
take half of 576
288

i dont understand how are the circle and sphere related?

ok so they share the same radius
is the entire circle shaded?

here the picture

i have to divide pi in both side

yes

i find the raidus 6.32455532

correct

SA=4pi*(6.32)^2

159.7pi

correct and you can round up to 160 since we rounded the radius

Find the volume of a sphere whose surface area is 64π cm2.

first find radius
4pi*r^2 = 64pi

good
now use that to find volume
V = 4/3pi*r^3

i got 256pi over 3

correct

Find the surface area of a sphere whose volume is 288π cm3.

same thing we just did except use volume formula to find radius
V = 4/3pi*r^3 = 288pi

what should i do with 4/3 pi?

well first get rid of pi by dividing pi on both sides like last time
then we will divide by 4/3

x by 3/4 by both side

correct

what about 288*3/4

think of it as (288*3)/4

i got 6 as radius

correct put that in SA formula

144pi

correct

you can do this one, its just using the formula for circle area and SA
the radius is just r

ok i will but i need to leave right but i tell you when i get home

k

yes lets fill in the gaps
A = area circle
SA = area circle + 1/2 SA of sphere

the area of that is pir^2

good
A = pir^2

we know the radius is r so that mean..

whats SA of sphere

4pir^2

good
SA hemishere = pir^2 +(1/2)*4pir^2
add like terms

3pir^2

good
and A = pir^2 right?
so SA = ___ * A

what the of Agreat cicrle= and Shemisphere=

i forgot to put answer

A = pir^2
SA hemishere = pir^2 +(1/2)*4pir^2 add like terms

so that is the answer or i have to solve it

no thats the answer, remember we dont know what r is

oh ok so SA = r * A

well does that sense?
sub in what we know
SA = 3pir^2 and A=pir^2
3pir^2 = r*pir^2
is that true?

not really

ok look at it this way
SA = 3pir^2
if i plug in A for pir^2
i get SA = 3A

ok use what we just learned
SA = 3A = 4 gal + gal for the floor

rid of a and 5 gal

sorry i was unclear there
we dont know num of gall for the floor, lets call it x

ok

we know SA of top is 2*pir^2
SA = 2pir^2 = 2A

2A = 4 gall

then divide by 2

A = 2 gal

yes

total = 3A
A = 2 gall
so total = 3*2 = 6 gallons

i got it thank you so much

your welcome

if i need help for my homework can u help me

yeah if you post it and im on sure

thank again ^_^ that help me a lot from you