6.75%
1 penny = 50% chance of tail
50% x 50% x 50% x 50%= 6.75%
f(x) is concave down on an interval I if all of the tangents to the curve on I are above the graph of f(x)
To determine the perimeter of the triangle given the vertices, calculate the distances between pair of points. For the first pair (-5,1) and (1,1), the distance is 6. For the next pair, (1,1) and (1, -7), the distance is 8. Lastly, for the pair of points (-5,1) and (1, -7), the distance is 10. Adding all the distance will give the perimeter of the triangle. Thus, the perimeter is 24.
Just cube 0.6 again to find the answer.
0.6 * 0.6 * 0.6 = 0.216
So it's the cube root of 0.216.
