In the diagram below, PT is a diameter of the circle with centre O. M and S are points on the circle on either side of PT.
MP, MT, MS and OS are drawn.
M = 37°
М.
23707
T
2
1
2
1
S
Р
Calculate, with reasons, the size of:
8.1.1
M1
8.1.2
이
In the diagram o is the centre of the circle. KM and LM are tangents to the circle
at K and L respectively. T is a point on the circumference of the circle. KT and
TL are joined. O, = 106°​

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.