I need help please help me please! A certain radioactive element decays at a rate of 50% each hour. If the initial amount of the element is 9.5 grams, write an equation that represents the amount of the element after x hours. What is the number of grams of this element at 5 hours?

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Write a story that matches with the expression 42x-5 pls hurry