Answer:
40.192 centimeters
Step-by-step explanation:
The circumference of a circle can be found using:
c= pi* diameter
First, we must find the diameter. The diameter of a circle is twice it’s radius.
d=2*radius
The radius of the circle is 6.4 centimeters. Substitute 6.4 for the radius.
d=2*6.4
d=12.8
Now we know the diameter. We can substitute 12.8 for diameter in the circumference equation.
c=pi*diameter
c=pi*12.8
We also know we are using 3.14 for pi, so we can substitute 3.14 for pi.
c=3.14*12.8
c=40.192
Use appropriate units: centimeters
c=40.192 centimeters
The circumference is 40.192 centimeters.
The thousands place is the fourth over to the left
so we are rounding the number 4
To determine weather it rounds up, we look at the number before it (to the right)
The number 2 is less than 5 so the 4 stays a 4
So we write the number until we get to the thousands position, which would be, 174
we then fill in all the numbers after it with zero's so the number, after it is rounded, is 174,000
So your answer is c
Answer:
The volume of the cone is 314yd³
Step-by-step explanation:
radius = half of diameter
d = 10yd
r = 10yd / 2 = 5yd
First of all to solve this problem we have to know the formula to calculate the volume of a cone
v = volume
r = radius = 5yd
h = height = 12yd
π = 3.14
v = 1/3 * π * r² * h
we replace with the known values
v = 1/3 * 3.14 * (5yd)² * 12yd
v = 1/3 * 3.14 * 25yd² * 12yd
v = 314yd³
The volume of the cone is 314yd³
Answer:
b is the variable.
Letters in math are called variables
Step-by-step explanation: