Answer:
Y=240sin(180πx)
Step-by-step explanation:
All i really looked at was the last part 180πx since it was running 90 cycles per second my natural instinct was to do this
90 times 2π and i got 180π
Steps to solve:
b + 4.22 = 7.08
~Subtract 4.22 to both sides
b = 2.86
Best of Luck!
9x² - 6x