The mass of a an atom of helium is 6.65 x 10^-24. Use scientific notation to express the mass of 250 helium atoms.

A) 1.6625 x 10-21

B) 1.6625 x 10-22

C) 1.6625 x 10-24

D) 1.6625 x 10-26

John J. Parker worked 44 hours this week. He gets time-and-a-half for any hours beyond 40. How many regular pay hours did John work? How many hours beyond 40 did he work? Using method 2, what are John's adjusted overtime hours

Which of the equations below represents a line parallel to the y-axis? A) x=-9 B) x=9y C) x=y D) x=-y

If g is an odd function and g' (3) = 4, what is g' (-3) ?

Xavier and Trevor work different jobs. They are each paid an hourly rate with no base pay. In one week, Xavier earns $183 for working 15 hours and Trevor earns $114 for working 10 hours. Which statement correctly compares their pay? a.

How wide must insulation be to wrap around a 10 inch square duct?

Slope and intercept y = - x + 2

An item is regularly priced at $75. It is on sale for 80% off the regular price. How much (in dollars) is discounted from the regular price?

Joseph says that there is 5/8 of a ham sandwich left and 1/2 of a turkey sandwich left what is not a pair of equivalent fraction for 5/8 and 1/2

Aspen added 14 to the product of 224 and 16. What is the sum?

the number 42,__2 rounded to the hundred place is 42300. what is the least possible sum of the two missing digits? justify your answer.