<h3>
Answer: C) 2.47 cm</h3>
=====================================================
Explanation:
We have 81 cm^3 of clay. Divide this among the 20 students and each gets 81/20 = 4.05 cm^3 of clay
--------------
The volume of a cone is
V = (1/3)*pi*r^2*h
Solving for h gets us
3V = pi*r^2*h
(3V)/(pi*r^2) = h
h = (3V)/(pi*r^2)
--------------
The diameter is 2.5 cm which cuts in half to 1.25 cm, so this is the radius.
We'll plug this radius in, along with V = 4.05 and pi = 3.14
h = (3V)/(pi*r^2)
h = (3*4.05)/(3.14*(1.25)^2)
h = 2.4764
This value is approximate. Rounding down to the nearest hundredth gets us 2.47
We round down because rounding up to 2.48 will lead to a volume larger than 4.05
Answer:
I believe the answer is B
Step-by-step explanation:
Answer:
-127.488°
Step-by-step explanation:
45" is 0.75 of 1', so -128° 30' 45" = -128° 30.75'
Next: 30.75' is 30.75/60 of 1°, and or -128° plus 0.5125 of 1°.
The final answer is found by adding 0.5125° to -128°:
-128.0000°
+ 0.5125°
--------------------
-127.4875
To the nearest thousandths of a degree, that would be -127.488°
High school A had 15 people in each van and bus.
Answer: 6π
Step-by-step explanation:
Area of a circle = πr².
To find the circumference, we have to find the radius first
Since the area of the circle in question is 9πcm²
9π = πr²
r² = 9π/π
r² = 9
r = +/-√9
= +/- 3.
To find the circumference now, we substitute for r in the formula above
Circumference = 2πr
= 2 x π x 3
= 6π.
Don't forget the π there must not be define
So the answer = 6π
