The population of springdale increased by 20% in ten years. the population now is 24,000 people. what was the population ten years ago?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?