A tumor is injected with 10 grams of Iodine-125, which has a half-life of 76 days. Write an exponential model representing the amount of Iodine-125 remaining in the tumor after t days. Then use the formula to find the amount of Iodine-125 that would remain in the tumor after 20 days.

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15