Larry has taken out a loan for college. he started paying off the loan with a first payment of $150. each month he pays, he wants to pay back 1.3 times as the amount he paid the month before. explain to larry how to represent his first 15 payments in sigma notation. then explain how to find the sum of his first 15 payments, using complete sentences. explain why this series is convergent or divergent.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

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.