an equilateral triangle has all equal sides, thus EQUI = equal.
so 21 ÷ 3 = 7, so each side is 7, 7+7+7 = 21 <- perimeter.
In one revolution of the wheel, a point on the edge travels a distance equal to the circumference of the wheel.
The wheel has radius 1 ft, so its circumference is 2π (1 ft) = 2π ft.
Then the point has a linear speed of
(1/4 rev/s) * (2π ft/rev) = 2π/4 ft/s = π/2 ft/s
Answer:
A. The red cylinder
Step-by-step explanation:
<h2><u>Which cylinder has the greater volume </u></h2><h3><u>volume of a cylinder</u></h3>
formula:
V =
<h3><u>volume of the blue cylinder</u></h3>
V =
=
=18.84956
to 2 dp
volume of the blue cylinder is <u>18.85 </u>
<h3><u>volume of the red cylinder</u></h3>
V =
=
= 37.69911
to 2dp
volume of the red cylinder is 37.70
<h3><u>the cylinder which has the greater volume is : A. The red cylinder</u></h3>
Answer:
Step-by-step explanation:
It's the square root of the variance
The variance is just the second moment minus the first moment squared