Explique porqud algunas raices cuadradas tienen raices positivas y negativas mientras que otras soluciones solo tinen raiz positiva

Name the most appropriate metric unit for each measurement like the mass of cow

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

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.