Kennedy bought some bracelets for $5.00 and a necklace for $30.00. She spent a total of $55.00 How many bracelets did she buy?

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 hot tub located near the middle of a rectangular patio has a diameter of 48 inches. the patio measures 11 feet by 6 feet. what is the area of the patio that is not covered by the hot tub?

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?