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.
B.
Because when doing the math, letter B fits the criteria of a quadratic equation. Which is ax^2 + bx + c = 0.
A is wrong because if we were to do the math, there would be no ax^2. The most important thing in a quadratic equation is the term ax^2, bx and c do not matter as much.
C is wrong because there cannot be a greater exponent than ^2.
D is wrong because of the same reason as letter a.
N=2.2
Hope this helps! If you're satisfied with this answer.. Brainliest please.
Answer:
if 1/6 of a roll of paper covers 1/4 of a wall, this means that we will need 4/6 of a roll to cover a whole wall, now the question is asking how many rolls will we need to cover 4 walls, we already know that it takes 4/6 to fill one wall so if we add 4/6+4/6+4/6+4/6 we will get 16/6 or 2 4/6
we will need 16/6 or 2 4/6 of rolls of paper to cover 4 walls
Answer
y=−3/5x−23/5
given the slope m of a line then the slope of a line
perpendicular to it is
