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Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

The area of a circle is equal to 1 dm². find the radius of the circle.