Find the mean (average)

the data set below?

2 18 28 5

4' 5'10'20

Which statement is true about 513? A. It is a prime number. B. It is a composite number. C. It is a whole number that is neither prime nor composite. D. It is not a whole number.

The cost of first-class postage in the United States increased approximately 5.4% in January of 2006 to 39 cents. What was the pre - January cost of the first-class stamp? Round your answer to the nearest penny.

Manuel traveled 7 hours nonstop to Mexico, a total of 302 miles. He took a train part of the way, which averaged 60 mph, and then took a bus the remaining distance, which averaged 40 mph. How long was Manuel on the train?

5.4x10^2/1.2x10^-1 Scientific Notation

2 km 5 m is equal to: a) 2.005 km b) 2.0005 km c) 2.5 km d) 2.05 km

What is the Greatest common factor of 8,27,35

What is the slope of the line passing through - 7,-2 and 4,1

Find y if x=15 if y is 6 x=30

What is 0.5% as a decimal and as a fraction in simplest form

5 3/5 + 7/10 - 2 2/3