Answer:
r = 3 in.
Step-by-step explanation:
vol = Bh where B is the area of the base and h is the height of the cylinder
The base is a circle so
B =
h = 5
141.3 = 3.14(5)![r^{2}](https://tex.z-dn.net/?f=r%5E%7B2%7D)
= 15.7![r^{2}](https://tex.z-dn.net/?f=r%5E%7B2%7D)
= 141.3/15.7 = 9
r = 3 in.
Answer:
Step-by-step explanation:
V=4/3pie(7)^3
Answer:
A = 21 cm²
Step-by-step explanation:
The area (A) of a trapezium is calculated as
A =
h (b₁ + b₂ )
where h is the height between bases and b₁, b₂ are the parallel bases
Here h = 3, b₁ = 9, b₂ = 5 , then
A =
× 3 × (9 + 5) = 1.5 × 14 = 21 cm²
First you want to count over the number of zeros that there are untill a number comes into the ones spot
so you would count over 6 to get 3.47
then you you would do 3.47x10^-6
you might ask why negative six well you are going to the right of the decimal not the left
Answer: 3.47x10^-6