Who wants to date ( btw im bi sooo)

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

What is the absolute value of the complex number -4-sqrt2i

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.