There are 21 plates of tomato sandwiches, 27 plates of cheese sandwiches, and 12 plates of beef sandwiches on a buffet table. if a guest randomly picks a single plate, what is the probability that he gets tomato or cheese sandwiches? a) 0.10 b) 0.25 c) 0.48 d) 0.80

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

Find the area of the regular hexagon if a side is 20 cm.

In the diagram of circle o, what is the measure of zabc?