The circumference of a square orchard is 1600
meters. How many square
meters does the orchard
cover? How many hectares

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

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.

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?