math

posted by .

The half life of iodine - 131 is 8 days. How long will it take for 7/8 of the sample to decay?

  • math -

    That means 1/8 is left.

    1/8=(1/2)^n

    looks like n=3days

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math with science

    Radioactive iodine treatment is so successful at treating hyperthyroidism that it has virtually replaced thyroid surgery. To the nearest full day, determine how long it will take for 400 millicuries of I-131, which has a half-life …
  2. chemistry

    Iodine-131 is used to destroy thyroid tissue in the treatment of an overactive thyroid. the half-life of iodine-131 is 8.02 days. if a hospital receives a shipment of 200.0g of iodine-131, how much iodine-131 would remain after 32 …
  3. Math

    Please show me how to solve: Doctors can use radioactive iodine to treat some forms of cancer. The half-life of iodine - 131 is 8 days. A patient receives a treatment of 12 millicuries of iodine - 131. (A mullicurie is a unit of radioactivity.) …
  4. chemistry

    Iodine-131 has a half life of eight days. What mass of iodine-131 would remain from a 20g sample after 32 days?
  5. chemistry

    Iodine-131, a beta emitter, has a half-life of 8 days.How many grams of a 10.0g sample of iodine-131 would remain after 56.0 days?
  6. Chemistry

    If the half life of Iodine-131 is 8.10 days, how long will it take for 120.0 g to decay to 7.50g?
  7. Algebra

    A defective nuclear reactor is leaking radioactive iodine-131. The rate of decay of iodine-131is given by the function defined by A(t)=A_0 e^(-0.087t), where t is time in days. How long will it take any quantity of iodine-131 to decay …
  8. Exponential Growth and Decay

    Doctors use iodine-131 to treat some forms of cancer. The half-life of iodine-131 is 8 days. A patient receives a treatment of 12 millicuries. A millicurie is a unit of radioactivity. How much iodine-131 remains in the patient 16 days …
  9. Chemistry

    How long will it take for a 18.0-g sample of iodine-131 to decay to leave a total of 2.25 g of the isotope?
  10. science

    A Geiger counter is used to measure the activity of a sample of iodine-131. Based on the data, what is the half-life of iodine-131?

More Similar Questions