What equals -1.5 + =0

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?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41