What are the amplitude, period, and phase shift of the given function? f(t)= -1/3sin(4t-3pi)

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?