the correct answer is C to this question
Answer:
I don't understand the question
Answer:
Distributive Property.
Step-by-step explanation:
Cos(A-B)= Cos A- Cos B
The variables in the parenthesis gets multiplied into the Cos
Cos A - Cos B
1/2 Kilowatt hours is 500 watts/ hours so the doughnut gives 500 watts per hour to a 15 watt load. You can run your light for 33.33 hours on one doughnut. Then you need another doughnut.
Answer:
The cost of painting the curved surface of pillar is: 68.69
Step-by-step explanation:
Given that
Diameter of pillar = d = 50 cm
As the height is in meters and we have to find the cost in per square meter, we have to convert cm into meters.
So,
d = 50/100 = 0.50 m
Now the radius will be:
![r = \frac{d}{2} = \frac{0.50}{2} = 0.25m](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7Bd%7D%7B2%7D%20%3D%20%5Cfrac%7B0.50%7D%7B2%7D%20%3D%200.25m)
Also
Height = 3.5m
The curved surface area of cylinder is given by:
![CSA = 2\pi rh](https://tex.z-dn.net/?f=CSA%20%3D%202%5Cpi%20rh)
Putting the values
![CSA = 2 * 3.14 * 0.25 * 3.5 = 5.495\ m^2](https://tex.z-dn.net/?f=CSA%20%3D%202%20%2A%203.14%20%2A%200.25%20%2A%203.5%20%3D%205.495%5C%20m%5E2)
It is given that the cost per square meter is 12.50
The total cost for 5.495 m^2 will be: 12.50 * 5.495 = 68.6875
Rounding off to nearest hundredth: 68.69
Hence,
The cost of painting the curved surface of pillar is: 68.69