How is this passage effective at conveying Roderick’s madness?

What is the base of 1/9 to the power of 2

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price