The diameter of a bacteria colony that doubles every hour is represented by the graph below. what is the diameter of the bacteria after 9 hours? (0,1) (1,2) (2,4) (3,8)

answers:
128
256
512
1024

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=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?

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?