A man bought two books for Rs.1040. He sold one at a loss of 15% and the other at a profit of 36% then he found that each book was sold for the same price. Find the cost price of each book.

Solve |x| > -9 a) {x|x< -9 or x> 9} b) all reals c) no solution

Plz i want answer and i would appreciate it is is a b c or d

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.