The scale of map is 1: 25000. the distance between two villages is 10cm on the map. find the actual distance in km between the villages.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

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.

With number 11 ( show how you got the answer)