1) Faotoid
People measure the heights of
places that are above sea level. The
height of a place above sea level is
called its elevation. Denver,
Colorado, has the highest elevation
of any major city in the United States.
It is over a mile above sea level!

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

Hundred and tens tables to make 430 in five different ways