Martha has $100 in a savings account. every month, she deposits $250 into her savings account. she sees an advertisement for a new refrigerator that’s available for $1,200. she calls the store and talks to a salesperson, who says she can purchase the refrigerator interest free by paying $80 per month until the balance of the purchase is paid. at the end of months, she still has owes $720 for the refrigerator.

When eating out, record the total cost of your meal (before tip) and the tip that you left. determine the percent of the cost of the meal that you left as a tip.

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Select the quadratic that has root x = 8 and x = -5