Answer:
It would take 27.5 minutes the element to decay to 154 grams.
Step-by-step explanation:
The decay equation:



Integrating both sides


When t=0, N=
= initial amount





Decay equation:

Given that, the half life of of element X is 11 minutes.
For half life,
, t= 11 min.





[
, since ln|1|=0]
N=154 grams,
= 870 grams, t=?



=27.5 minutes
It would take 27.5 minutes the element to decay to 154 grams.
Answer:
x<-1303/700
Step-by-step explanation:
Answer:
A. Yes
B. Yes
C. No
Step-by-step explanation:
We can substitute each value in to the equation and see if the sides match up. Let's start with a.

So, n = 2 works for equation a. Let's try B.

So, m =
works for B. Now let's try C.

So y = 30 doesn't work for C.
Hope this helped!
Answer:
x = - 1
Step-by-step explanation:
The equation of the axis of symmetry for a parabola in standard form
y = ax² + bx + c : a ≠ 0 is found using
x = - 
y = - x² - 2x - 5 ← is in standard form
with a = - 1 and b = - 2, thus equation of axis of symmetry is
x = -
= - 1
Equation of axis of symmetry is x = - 1
Answer:
C) 10 inches
Step-by-step explanation:
I think the simplest way to do this is as follows:
divide 75 by 15 to get how many times you need to multiply 2in by
75/15=5
since 15(5)=75 or the actual size of the airplane,
2(5)=10 which is the size of the model airplane