Question

Find the volume of the composite space figure to the nearest whole number.


170 cm3
180 cm3
120 cm3
60 cm3

Answer 1

A balloon has a circumference of 22 in. Use the circumference to approximate the surface area of the balloon to the nearest square inch.
154 in.2
616 in.2
1,521 in.2
484 in.2

is this one 154 in.2

Answer 2

ok... you need to find the volume of 2 prisms....

the prism on the left has length 8, width 5 and height 3

the prism on the right has length 2 width 5 and height 6

find the volume of each prism and then add the volumes to get the composite volume...

Answer 3

would it be 1/3 times 8 times 5
and 1/3 times 2 times 5

Answer 4

then multiply them by there height and them divide by 3

Answer 5

I'll assume the balloon is a sphere

The circumference of a circle is

\[C = 2\pi r\]

you need to find r

\[22 = 2 \pi \times r\]

\[r = \frac{22}{2\pi}\]

get a value for r and substitute it into the formula below

Formula is \[SA = 4\pi r^2 ..... or ...SA = 4\times \pi \times r^2\]

Answer 6

The volume of a prism

\[V = l \times w \times h\]

Answer 7

ok

Answer 8

i got 120 and 60

Answer 9

correct to the total volume = 180 for the prisms

Answer 10

ok so is that the answer

Answer 11

yes

Answer 12

thank you!

Answer 13

what about that second problem i posted

Answer 14

can you figure out r in the balloon question..?

Answer 15

is that 1 right

Answer 16

pi r squared?

Answer 17

no your question says the circumference = 22

so

\[22 = 2\pi r\]

so

\[r = \frac{22}{2\pi}\]

Answer 18

3.50

Answer 19

good the surface area formula is

\[SA = 4\times \pi \times r^2\]

just substitute 3.5 into the formula to find the surface area

Answer 20

153.86

Answer 21

correct so use 154

have to go... good luck

Answer 22

thanks that was all the problems!