1. LQ 5 points
Directions: Use the diagram below along with the bank to classify each circle part. Parts may be
used more than once.
R
Parts of Circles
Center
Radius
Chord
Diameter
Secant
Tangent
Point of Tangency
Minor Arc
Major Arc
Semicircle
Central Angle
Inscribed Angle

Anyone know? will mark brainliest if you're correct!

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.

Find the missing variable for a parallelogram: a = latex: 28in^2 28 i n 2 h = b = 6.3 in (1in=2.54cm)