randy719
29.09.2019 •
Mathematics
What is the approximate volume of a cone with a height of 9 ft and radius of 3 ft?
use 3.14 to approximate pi, and express your final answer to the nearest hundredth.
i got the answer 84.78 from doing (1/3)(3.14)(9)(9), but i'm not sure how to round it.
correct me with an explanation if i am wrong.
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Ответ:
h=9
r=3
V=(1/3)(9)(3.14)(3^2)
so you aer right because 3^2=9
well, the rounding should be told to you by your teacher
sometimes they don't want you to round
since they told you to use 3.14 for pi, I don't think you should round
just do 84.78 cubic feet
Ответ:
No, he made a mistake solving for the volume of both figures.
Step-by-step explanation:
You can just look at the formula and see it
Volume of a square pyramid : V=1/3bh , he forgot to use the 1/3. Volume of a cylinder: πr^2h , he forgot the π