49.5(0.82)^x

What is the rate of change? I know it is decay already.

Just checking to make sure I know it is right.

You are correct in stating you have a decay. This is because the base of the exponential 0.82 is in the form 1+r where 1+r = 0.82 solves to r = -0.18

The negative r value means we have decay.

The rate of decay is 18% since 0.18 = 18/100 = 18%

For example, if we started with 100 items then after 1 unit in time, you'd have 82 items since 100-18 = 82

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

594 square inches

step-by-step explanation:

vote !