Answer:
It will take 50 years to decay from 512 grams to 121.5 grams.
Step-by-step explanation:
The decay formula :

where
N= amount of substance after t time
N₀= initial of substance
t= time.
A substance decays at a rate 25% every 10 years.
So, remaining amount of the substance is = (100%-25%)= 75%
, t= 10



Taking ln both sides



Now , N₀= 512 grams, N= 121.5 grams, t=?




Taking ln both sides




⇒t=50 years
It will take 50 years to decay from 512 grams to 121.5 grams.
Answer: y = 1.50x + 19 and y = 2.75x + 14
y = 25
x = 4
Both services will charge an equal cost of $25 for 4 hours.
The correct answer is A. 15,200.00
Explain
E= 1 -x/p
X= 293
P= 473 k
E= 1 -x/p = 1 - 293/473. = 0.38
So now E= 0.38 —> 38%
40, 000,000 x 0.38 = 15, 200, 000
Hope this help you
Stay safe :D
Answer:
The answer is 20 hours
Step-by-step explanation:
This is becuase 1280 divided by 64 equals 20. There are no unit coversions.
Answer:
Step-by-step explanation:
W(-4,-10) lies on third quadrant.
M(-12,0) lies on second quadrant or can say in x axis
C(8,3) lies on first quadrant.
K(11,-5) lies on fourth quadrant.