a 46 gram sample of substance that'a a by product of fireworks has a k value of 0.1368 N = N0e -kt N0 = 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
find the substances half life, in days. round your answer to the nearest tenth.

an altitude of 15,000 feet

step-by-step explanation:

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.