The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. starting with 115 grams of a radioactive isotope, how much will be left after 6 half-lives? use the calculator provided and round your answer to the nearest gram.

You can do this without the calculator

115 grams

after 1 half-life = 115 / 2 = 57.5 grams

after 2 half-lives = 28.75 grams

after 3 half-lives = 14.375 grams

after 4 half-lives = 7.1875 grams

after 5 half-lives = 3.59375 grams

after 6 half-lives = 1.796875 grams

Step-by-step explanation:

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950