Answer:
Step-by-step explanation:
Given :A spinner has three equal sections labeled 1, 2, and 3. It is spun twice.
Solution :Which expression can be used to determine P(2, then 1)?
Solution :
Total no. of events = {1,2,3}=3
When it is spin for the first time .
Since we are given in the first spin she should get 2
No. of Favorable events ={2}=1
probability of getting 2 =
= 1/3
In second spin she should get 1
No. of Favorable events ={1}=1
probability of getting 1=
=
Thus P(2, then 1) =
Hence the expression : P(2, then 1) =
=
Answer: The age of the fossilized leaf is 13829 years.
Step-by-step explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant = 100
a - x = amount left after decay process =
a) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
b) for finding the age
The age of the fossilized leaf is 13829 years.
<u>Answer: </u>
Simplified form of given expression (2x – 9 )( x + 6 ) is
<u> Solution: </u>
We need to simplify following expression.
(2x – 9) ( x + 6)
For sake of simplicity lets first assume 2x – 9 = A
So expression becomes A(x+6)
= Ax + A6
Now replace A by 2x – 9
= (2x – 9 ) x + (2x – 9 ) 6
On simplification, we get
Hence simplified form of given expression (2x – 9 )( x + 6 ) is