Can someone pl help. Thx

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

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?