The lynn’s family bought a house for $75,300 a few years later they sold the house for $80,250 how much greater was the selling price than the purchase price

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Can any one me with the answers to these questions asap?

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