Can somebody please solve the problems with work, thank you.
This is from California Math Course 3 (Volume 2) Chapter 6 Transformation Geometry Page 499

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

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?

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?