My daughter needs help with her homework. Here is the question.
Keisha is planning a barbecue for her family. There will be five people in attendance at the barbecue. Each person can eat five-eighths of a pound of steak. How many pounds of steak will Keisha need? Between what two whole numbers does the amount of steak Keisha needs lie? Show all your mathematical thinking.

How is working backward similar to solving an equation?

In the diagram of circle o, what is the measure of zabc?

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.