In the diagram PQRS is a circle centre O. If <POQ=150°,<PSR=54°.Calculate <RQS

If you could answer these your a life saver

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.

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?