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The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)