I find it easier just to graph this sort of question rather than multiply it all out.
x = 3.5
_____
(x^2 +2x +1) -(x^2 -6x +9) = 20
.. 8x -8 = 20
.. x = 28/8 = 3.5
Answer: CSA = 22.9m^2
Step-by-step explanation:
The cross sectional area of the cylinder perpendicular to the length, is the area of the circular base or top of the cylinder. It can be derived mathematically using the area of a circle.
Cross sectional area = πr^2
Where r is the radius of the cylinder
r = 2.70m
CSA = π×2.70^2
CSA = 22.9m^2
Draw arcs on either side of a given point on the line
To construct a line perpendicular to another line through a point on the line:
Measure a length from that point to one edge of the line
Draw two intersecting arcs on either sides of the line
Draw a straight line from the intersecting point of the arcs to the point on the existing line.
The new line drawn is a perpendicular line.
The only step necessary out of the given choices is "Draw arcs on either side of a given point on the line"
Option C is the correct choice
Learn more here: brainly.com/question/929137
4) 975
5) 53/7650
…… ,… … … …
1/2 / 3 = 1/2 x 1/3 = 1/6
each person will get 1/6 lb of chocolate