K^2-16
=(K-4)(k+4)
Because 4 • -4= -16
A= a+b/2 x h
A=base
B=base
H=height
Answer:
yes cuz my butt is phat
Step-by-step explanation:
Answer:
The answer is 18
hope this helps
have a good day :)
Step-by-step explanation:
Answer: It will take about 77 years (76.8 years).
Step-by-step explanation: Time is given by the equation: N=No.e^kt. You know that the concentration has to be 15% from the original so N=15 and No=100. To determine k, you have to look at the half-life. k=ln(0.5)/half-life time. For 28 years, k=-0.0247. Replacing it back into the N=No.e^kt equation, the answer will be 76.8 years.