In the diagram, g ∥ h, m∠1 = (4x + 36)°, and m∠2 = (3x – 3)°. Lines g and h are parallel and diagonal down to the right. A horizontal line cuts through lines g and h. Another vertical line goes through lines g and h and the horizontal line. At the intersection of the vertical line with line h, the bottom left angle is angle 1 and the bottom right angle is angle 3. At the intersection of the vertical line with line g, the uppercase left angle is angle 2. What is the measure of ∠3? 21° 60° 120° 159°

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.