Make 6 prime number using 1,2,3,4,5,6,7,8,9

In the surface area formula for cylinders which expressionrepresents the lateral area

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.