P = 2*pi*sqrt(a^2 +b^2/2 =
2 *3.14 * sqrt(15/2^2 +7.5/2^2/2 =
6.28 x sqrt(56.25+14.0625/2
6.28 *sqrt(35.15625)
6.28 * 5.929270613= 37.235
answer is B 37.3 feet
Answer:3 breakfast bars for£1.50
Step-by-step explanation:if you got two packs you would have 6 bars for three pound when one of the offers was 5 breakfast bars for 3 pound so the 3 breakfast bars for £1.50 is the best offer.
Answer:
Options A-C-F
Step-by-step explanation:
we know that
<em>The circumference of a circle is equal to</em>
or ![C=2\pi r](https://tex.z-dn.net/?f=C%3D2%5Cpi%20r)
where
D is the diameter and r is the radius
therefore
or ![\pi =\frac{C}{2r}](https://tex.z-dn.net/?f=%5Cpi%20%3D%5Cfrac%7BC%7D%7B2r%7D)
The number pi is the ratio circumference - diameter or is the ratio circumference - 2 times radius
<em>The area of the circle is equal to</em>
![A=\pi r^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E%7B2%7D)
therefore
The number pi is the ratio Area - radius squared