Place the circles in order from the circle with the smallest area to the circle with the largest area.
a circle with an
area of 1,040.09
square units
a circle with a
radius of 27 units
a circle with a
circumference of
87.92 units
a circle
diame
19 unit
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The trigonometric ratios sine and secant are reciprocals of each other

Which of the binomials below is a factor of this exression? 16x^2+40xy+25y^2 a.4x-5y b. 2x-5y c.4x+5y d.2x+5y

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.