Factory A pays its salesman 1 euro per item sold plus a fixed amount of 500 euros. Other factory B pays 1.5 euros per item and 300 euros fixed. How many items must the salesman from Factory B sell to earn more money than factory A? 6. What are the numbers whose square exceeds its own number by more than two?

7. A father and his son have been 30 years apart. Determine in what period of their lives the father's age exceeds by more than 10 years to twice the age of the child.

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?