Which is the graph of r=6cos

Step-by-step explanation:

When the angle Ф = 0, cos Ф = 6 because the coefficient of the cos function is 6.  Thus, the first point you'd want to plot would be (0, 6).

If Ф increases to π/2, cos Ф = 0.  Plot (π/2, 0).

If Ф now increases to π, cos Ф = -1.  Plot (π, -1).

And so on ...     increase Ф by π/2 each time.

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%