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How many days was the temperature above 90 degrees?

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

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