What is the population growth rate of a country with an initial population of 100 million and a population of 500 million 60 years late?
a. 02%
b. 1.2 %
c 2.1%
d. 2.7%

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Given the sequence 7, 14, 28, 56, which expression shown would give the tenth term? a. 7^10 b. 7·2^10 c. 7·2^9

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?