Consider a right triangle with acute angle of measure and cos 8 = Part A
Use the Pythagorean identity to write an equation that can be used to find sin 8. Then find the value of sin in
simplest radical form.
Equation:
Value: sine
Part B
Which of the following expressions are equivalent to tan ?
4
433
33
733
33

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.