Find the amplitude of a sinusoidal function that models this temperature variation

Im sorry but what on

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o

Well if you have 20 bats you probably want 20 balls? you don’t have enough context to answer the question.