Answer:
a= 4
b= -10
c= -7
d= -1
Step-by-step explanation:
A is irrational but b is rational. This is because for b you can work out both square root of 64 (8) and square root of 4 (2). But for a, the square root of 5 is an irrational number :)
Answer:
1. 5,040
2. 504
3. 0.1
Step-by-step explanation:
just took the assignment
Answer:
Step-by-step explanation:
OMG!!!!! why don't you just SAY YOU WANT a BLEEPING REFLECTION!!!
I had to search through a slew of your questions to get clues as to what to do.
To reflect over the x axis, just negate the y term and leave the x term as it is.
M becomes (2, -1)
N becomes (-3, -1)
P becomes (-1, -4)
If
is the amount of strontium-90 present in the area in year
, and it decays at a rate of 2.5% per year, then

Let
be the starting amount immediately after the nuclear reactor explodes. Then

or simply

So that after 50 years, the amount of strontium-90 that remains is approximately

or about 28% of the original amount.
We can confirm this another way; recall the exponential decay formula,

where
is measured in years. We're told that 2.5% of the starting amount
decays after 1 year, so that

Then after 50 years, we have
