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

1. A bus departs at 11:25 am and arrives at the next stop at 2:15 pm. What is the travel time? A. 9 hours 10 minutes B. 3 hours 50 minutes C. 2 hours 50 minutes 2.

The area of w is 289 pi m². Find the circumference of w A. c=17 pi m B. c = 34 pi m C. c=68 pi m D. c=289 pi m

There are 12 players on a new softball team total registration is $572 and they also need to spend 1,240 on equipment players raised $786 and to pay the rest off decide to sell candles for $9.50 how much candles does each player have to sell

There are 20 cookies and 40 slices of pizza to be shared equally. Each student had the same number of whole cookies and same number of pizza with nothing left over.

How do you solve 2.7 repeating 7

Solve - 14 + 5x = - 12 really need this answer

Doug and Ken are meeting for lunch at Rodrigo's Mexican Restaurant. Doug's work place is 5 miles from the restaurant and Ken's work place is 7 miles from the restaurant.

6x2/5 will be greater or less than 2/5

Over winter break, Raymond worked 12.5 hours at the library and 20.5 hours at a café. The library paid him $13 per hour. If he earned a total of $459.75 from both jobs, how much did the café pay Raymond per hour?

A swimming pool is 15 feet wide, 50 feet long, and has an average depth of 5 feet. How many cubic feet of water will it hold