Sara, kim, and john own a painting company. to paint a particular home, sara estimates it would take her 4 days. kim estimates 5.5 days. john estimates 6 days. how long would it take them to work together to paint the house.

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?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

What does x = in this equation x+3+2x=x+5