The half-life of uranium-235 is 700 million years. If you start with 50 atoms of it, how many will you have left after 700 million years?

A. 50

B. 100

C. 25

D. 45

How much greater is 77353 then 70700

Two trains start from 128 mi apart and travel towards each other on parallel. They pas each other 1.6 hr later. If one train travels 10 mph faster than the other. Find the speed of each train

Write the percent of 56 1/4% into a fraction.

How to round 10 1/8 to the nearest whole number

If a=7 and b=2 what is (a-b) ^2

Solve the division problem round answer to nearest hundredth 9.2/52.063

Roland rented a truck when he moved. He paid a $105 rental fee, 0.20 per mile and a 10% insurance fee on top of the rental fee. If he drove the truck 325 miles, how much did he pay

How many solutions does the following equation have? 7 (y + 3) = 5y + 8 answer:

Which ordered pair is a solution to the equation 3x+2y=6? a. (-10,-12) b. (10, 12) c. (-10,12) d. (10,-12)

Vicky plans to wallpaper this wall. She buys some rolls of wallpaper. Each roll of wallpaper is 53 cm wide and 12 m long. The cost of one roll of wallpaper is £12.45. Work out the cost of wallpapering the wall. Vicky's wall is 5.7m wide and 2.