Seudónimo Seudónimo
  • 03-07-2017
  • Mathematics
contestada

a 9 gram sample of a substance that's used for drug research has a k-value of 0.1459

Respuesta :

Аноним Аноним
  • 09-07-2017
N = N0 e^(-kt)

for half life N/N0 = 1/2 and k = 0.1459

1/2 = e^(-0.1459t)

=> -0.1459 t = ln(0.5)

t = - ln(0.5) /0.1459

= 4.8 days
Answer Link

Otras preguntas

What is the lateral area of the rectangular prism with a base length of 17 m, a base width of 7 m, and a height of 5 m?
Two 1 litre jugs are each filled with a mixture of olive oil and vinegar. The first jug has 3 times as much as oil as vinegar and the second jug has 4 times as
What is the coefficient of y in the expression 12+3y-2x?
Find an equivalent ratio for 22/55 then write the proportion ?
other name for blood
Al washed a car in 6 minutes. Fred washes the same car in 8 min. How long dies it take Al and Fred to wash the car together?
FACTORIZE. 9x2y-24xy2-16y3 solve it
How consumers behaviour affect market equilibrium
The circumference of a circle is 6.28.What is the area of the circle?
The length of a pool is 3 feet more than twice its width. If the perimeter of the pool is 72 feet, find the dimensions of the pool by writing and solving a syst