The weight of an object exerts on a scale varies directly with the mass of an object. If a bowling ball has a mass of 6 kg, the scale reads 54.
What is the constant of variation?
If another object has a mass of 8kg, what would the weight on the scale read?

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?