Hey there! :)
Answer:
-1/5n + 7 = 2
Start by subtracting 7 from both sides:
-1/5n + 7 - (7) = 2 - (7)
-1/5n = -5
Multiply both sides by the reciprocal of -1/5, or -5.
(-5) · (-1/5n) = (-5) · (-5)
n = 25
How much of a radioactive substance must be presented to decay to 40 grams in 9 years if the half-life of the substance is 4.6 y
1 answer:
You might be interested in