One form of the element beryllium, beryllium-11. has a half-life of about 14 seconds
and decays to the element boron. a chemist starts out with 128 grams of beryllium-11.
she monitors the element for 70 seconds.
1. what is the equation that models the amount of beryllium-11 over time?

Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?