Vic sells ice creams.
the table shows the midday temperature and her sales for five days.
mon tues wed thur fri
temperature (°c) 24 30 28 19 17
sales (£)
225 260 230 180 150
work out vic's total profit for the five days.
this table shows vic's costs.
ingredients 12% of sales
fuel £9 per day

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?