A possible perimeter for the rectangle would be 28
Area=L x W
40/10=4
Width=4, Length=10
Perimeter=L+L+W+W
4+4+10+10=28
When is cos (x) = 0? <em>at 90° (aka π/2)</em>
Answer:
Twice a increased by the cube of a equals b :
2a + a^3 = b
