Answer:
Part A:
The surface area of a cylinder is given by
A= 6πr² if h= 2r
Part B:
Total Cost of covering the cylinder = Rate *2πrh + rate*2πr²
Cost of covering only the side = Rate *2πrh
Step-by-step explanation:
Part A:
The surface area of a cylinder is given by
A= 2πrh + 2πr²
Where h= height and radius = r
But we have the height twice as radius so h= 2r
So putting h= 2r we get
A= 2πr(2r) + 2πr²
A= 4πr² + 2πr²= 2πr²(2+1) = 2πr²(3)= 6πr²
Part B:
Cost = Rate * area of the wall + rate * area of the top and bottom
Cost = Rate *2πrh + rate*2πr²
Where area of the top and bottom= πr² +πr² =2 πr²
and area of the side = 2πrh
Multiplying both with the rate and then adding would give the total cost of materials needed to cover the outside of the cylinder and from top and bottom as well.
If you do not need to cover top and bottom then the expression would be
Cost of covering only the side = Rate *2πrh
Part C:
Already done above.
Answer:
12
Step-by-step explanation:
Answer:
75600k^4 m^4 Hope that help !
Step-by-step explanation:
1. Take out the constants (25×7×18×24) kkkkmmmm
2. Simplify 25×7=175 (175×18×24)kkkkmmmm
3. Simplify 175×18=3150 (3150×24)kkkkmmmm
4. 3150×24= 75600kkkkmmmm
5. The answer would be 75600k^4 m^4
I think it’s 25%
Because 70 divided by 10 is 7
Which is then 10% so 20% is 14 then 5% is half of 7 which is 3.5
So 70 -7-7-3.5=52.5 which is 25%
Answer:
80%
Step-by-step explanation:
regular price was given as $295.
The sale of the camera was $236.
Needed Percentage of the regular price =( 236/295)
= 0.8
=(0.8 × 100%)
= 80%
