Lucy's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs lucy $5.75 per pound, and type b coffee costs $4.10 per pound. this month's blend used four times as many pounds of type b coffee as type a, for a total cost of $819.55 . how many pounds of type a coffee were used?

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?