Need help. I can’t fail this!! 10

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work

Arock was dropped from the top of a building. the function that describes the height after it was dropped is f(x)=64-16x^2. what are the zeros of the function and what do they mean?