Answer:
37 700m² (rounded off to 3 s.f.)
Step-by-step explanation:
When the curved surface area of a cylindrical tank is laid out, it will be like a rectangular piece of sheet with the circumference of the base circle as its length and the height as its breadth.
Circumference of base circle with radius 30cm = pi × 30 × 2
= 60pi
2m = 200cm
Curved surface are = 60pi × 200
= 12 000pi
= 37 700m² (rounded off to 3 s.f.)
Answer:
$20
Step-by-step explanation:
There are a few ways to do this. We know 20% is 1/5 and 1/5 is 5 dollars. since that's the percent off, we would subtract it from 25.
For general percents off, they might not be so easy. It is important to know the method. We must multiply by the decimal of the percent, so
Now, since it is this amount off, we subtract 5 from 25.
$20 is the final price of the hat!
<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em>!</em>
The correct answer is 1/3
To solve this, we have to complete the square of
To do this with halve the and get rid of the x, then get rid of the power on , and then put them all in brackets, and the square the bracket, like so:
becomes
However does not equal
If we expand we get instead.
So to make it equal, all we do is subtract 1.
So when we complete the square of , we get
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So becomes:
x + 1 = ±√6
x = -1 ± √6
______________________________
Answer:
x = -1 ± √6
Answer:
(−∞,∞). no solution
Step-by-step explanation: