If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds?
a. one-fourth
b. half
c. one-eighth
d. you would need to know how many atoms you are starting with.

Aresearch company wants to test the claim that a new multivitamin to improve short term memory. state the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

Sorry guys but as you have a small brain

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.