A 48 gram sample of a substance that's used for drug research has a k-value of 0.1325. N Noe -kt No - initial mass (at time t - 0) N = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days​

How many $20 bills do you need to have to make $280

30 ! the graph shows the number of siblings different students have. select from the drop-down menus to correctly complete the statement.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.