Americium-244 has a half-life of 10 hours. if you start with 130 grams of americium-244, how much would you have remaining after 60 hours have passed?

2.03 g

Explanation:

We can calculate the amount of americium-244 left by using the following equation:

where

is the initial mass of the sample

is the time passed

is the half-life

Substituting data into the equation, we find

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west