Penny has an annual salary of $47 300. Calculate Penny's net income if she is to be taxed at 15%, with the first $6000 tax free.
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Is there an x intercept in the equation 60*1.15^x

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?