Answer:
The expression that represents the number of days until only 10% remains is T((d) 10 %) =100×
.
Step-by-step explanation:
The equation for half life is of the form
A = A₀×
.........................................................................(1)
Where
A = Final amount
A₀ = Initial amount
t = Time
h = Half life
For the equation T(d) = 100×2⁽⁻²⁾....................................(2)
We have by comparison with the equation for half life
2 ≡ 
and and the equation (2) can be written as
Percentage remaining after 2 half lives is
×100=100×
However if the half life of Technetium-99m is 6 hours then we have for one day
×100=100×
Therefore an expression that represents the number of days until only 10% remains is
×100=100×
= 10 %
=
= ㏑ = ㏑()
= 
×㏑
= ㏑()
= 
= 3.322
Therefore the expression for the number of days 10 % of Technetium-99m will be remaining is
T((d) 10 %) =100×
Answer:
a. 6
b. 144
Step-by-step explanation:
a. 25% of 24 is 6
b. 24 x 6 = 144
Answer:
x+y = 3
3x-y = 5
Step-by-step explanation:
x+y = 3
3x-y = 5
This system of equation will give the points(2,1).
Lets substitute the values x=2 and y = 1 in the equations:
x+y=3 equation 1
2+1 =3
3=3
3x-y=5 equation 2
3(2)-1=5
6-1=5
5=5
Lets solve the system:
Add the equations to eliminate y from the system:
x+y = 3
3x-y = 5
_______
4x = 8
Now divide both the sides by 4
4x/4 = 8/4
x=2
Now substitute the value of x in equation 1:
x+y=3
2+y=3
Combine the constants:
y=3-2
y=1....
Answer:
B=17
A=16
Step-by-step explanation:
It is my friend OK if you want say again and I can ans
The hypotenuse needs to be longest side but with inequalities it is more complicated so I am pretty sure you can not have those lengths on the triangle.
Might wait for a more qualified person to answer though, but that is my thought on it..
