Joyce rented a booth at a carnival at a cost of $95 to sell handmade beaded necklaces. the cost of making and packaging each beaded necklace was $15. if joyce sells the beaded necklaces at $35 each, how many beaded necklaces must she sell to make a profit of at least $500?

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Which of the following graphs represents the function f(x) = 2^x

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.