Answer:
1788 grams
Step-by-step explanation:
If you start with 7,152 grams of a radioactive kind of lanthanum and the half-life is 93 minutes, how much will be left after 186 minutes
We are to find Nt
The formula is given as:
Nt = No(1/2)^t/t½
Where
No = Initial amount = 7,152 grams
t = time elapsed = 186 minutes
t½ = Half life = 93 minutes
Nt = Amount of substance left
Nt = 7152(1/2)^186/93
= 1788 grams
Answer:
A) 2a + 6
Step-by-step explanation:
(5a + 3) + (2a + 3) + x = 9a + 12
Add both side lengths plus the unknown side to equal the perimeter.
7a + 6 + x = 9a + 12
-7a -6 -7a -6 Subtract 7a + 6 on both sides
x = 2a + 6 This is the missing side length.
Answer:
3
Step-by-step explanation:
Just like the other one, plug -6 in for x:
1/3(-6)+5=-2+5=3
$81! 70 + 11 = 81, therefore dan payed $81
First we have to find the vertex (h,k) h is also x and it also is the a xis symmetry
1st: group the number
(X2+6x)-9
2nd: use b/2
6/2 = 3 , 3^2= 9
(X2+6x+9)-9-9
(X2 + 3)-18
Vertex is 3,-18 so the symmetry is 3