Lodine-131 is used to find leaks in water pipes. It has a half-life of 8.14 days. Write the exponential
decay function for a 200-mg sample. Find the amount of iodine-131 remaining after 72 days.
Function f(x)=
Amount

Answer this question, only if you know the answer. 30 points and brainliest!

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?