Answer:
Circumfrence is pi*diameter. Radius is half the diameter, so..
23*2=46
And 46*pi
= 46pi
Answer:
Approximately , assuming that .
Step-by-step explanation:
When the force is constant, moving by in the direction of the force would do a work of .
However, in this example, as an increasing portion of the chain gets lifted up, the force lifting the chain would increase in size. Hence, apply the integral form of this equation.
Let denote the force required to lift the chain when the height above the ground is meters. At that moment, exactly of the chain would be above the ground. The mass of that much of the chain would be the mass of the whole chain.
.
Integrate with respect to :
.
In other words, it would take approximately of energy to raise one end of the chain to that height of .
Answer:
140
Step-by-step explanation:
dog : cat= 4 : 3
if there are 60 cats,
so, number of dogs = 4/3 × 60 = 80.
number of dogs AND cats = 80+60
= 140
Answer: 7x10 to the 4th
Step-by-step explanation:
I say it could surely be d not sure