If you are graphing ) = sin(theta°): for each theta marked on your horizontal axis, beginning at 0, use the spaghetti to
measure the vertical displacement from the horizontal to the relevant point on the unit circle. the vertical
displacement is the value of the sine function. break the spaghetti to mark the correct length, and place it vertically
at the appropriate tick mark on the horizontal axis.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.