Let T be the set of things found in a toy store, and V be the set of things that cost more than $50. The set T∪V is the set of things that found in a toy store or cost more than $50 . The set T∩V is the set of things that found in a toy store and cost more than $50 . The set T′ is the set of things that A cost under $50 B not found in a toy store C not found in a toy store and cost more than $50

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?