the height of water at the mouth of a river varies during the tide cycle. the time in hours since midnight and the height in feet are related by the equation: h=15+8cos(2π(t-3)/12 what is the maximum water height?

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

Hello!
your answer should be c