Correct answers only !
what is the check digit, d, for the visa number shown below?
4328 3103 2635 108d
a. 1
b. 3
c. 5
d. 7

In 1950, scientists estimated a certain animal population in a particular geographical area to be 6,400. in 2000, the population had risen to 7,200. if the animal population experiences the same percent increase over the next 50 years, what will the approximate population be? a) 8,000 b) 8,100 c) 8.400 d) 8.600