Find the area of a circle with a diameter of 4

12. 56

Step-by-step explanation:

The area of a circle is given by pi×r^2

where r is the radius. The question states That we should use 3. 14 in place of pi.

Area=3. 14×r^2

=3. 14×2^2

=3. 13×4

=12. 56

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

is should be y = 5x

step-by-step explanation:

correct me if im wrong