How many turning points can a polynomial with a degree of 7 have

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Quadrilateral abcd is a parallelogram with diagonals that intersect at point e. which of the following statements is true?