A rock of radioactive material decays at a rate of 7% an hour. There are currently 1,240 atoms in the rock. What would the formula for decay look for in this situation? How many atoms will be in the rock after 3 hours? How many atoms will be in the rock after 3 days?

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?