A patient is treated with 128 mCi (millicuries) of iodine-131 ( 131 I ) . The radioactivity level R ( t ) (in mCi) after t days is given by R ( t ) = 128 ( 2 ) − t / 4.2 . (In this model. the value 4.2 is related to the biological half-life of radioactive iodine in the body.) a. Determine the radioactivity level of I 131 in the body after 6 days. Round to the nearest whole unit.
A patient is treated with 128 mCi (millicuries) of iodine-131 ( 131 I ) . The radioactivity level R ( t ) (in mCi) after t days is given by R ( t ) = 128 ( 2 ) − t / 4.2 . (In this model. the value 4.2 is related to the biological half-life of radioactive iodine in the body.) a. Determine the radioactivity level of I 131 in the body after 6 days. Round to the nearest whole unit.
Solution Summary: The author explains how to calculate the radioactivity level of 131I in the body after 6 days.
A patient is treated with 128 mCi (millicuries) of iodine-131
(
131
I
)
. The radioactivity level
R
(
t
)
(in mCi) after t days is given by
R
(
t
)
=
128
(
2
)
−
t
/
4.2
. (In this model. the value 4.2 is related to the biological half-life of radioactive iodine in the body.)
a. Determine the radioactivity level of
I
131
in the body after 6 days. Round to the nearest whole unit.
I want to learn this topic l dont know anything about it
Solve the linear system of equations attached using Gaussian elimination (not Gauss-Jordan) and back subsitution.
Remember that:
A matrix is in row echelon form if
Any row that consists only of zeros is at the bottom of the matrix.
The first non-zero entry in each other row is 1. This entry is called aleading 1.
The leading 1 of each row, after the first row, lies to the right of the leading 1 of the previous row.
PRIMERA EVALUACIÓN SUMATIVA
10. Determina la medida de los ángulos in-
teriores coloreados en cada poligono.
⚫ Octágono regular
A
11. Calcula es número de lados qu
poligono regular, si la medida
quiera de sus ángulos internos
• a=156°
A= (-2x+80
2
156 180-
360
0 = 24-360
360=24°
• a = 162°
1620-180-360
6=18-360
360=19
2=360=
18
12. Calcula las medida
ternos del cuadrilá
B
X+5
x+10
A
X+X+
Sx+6
5x=3
x=30
0
лаб
• Cuadrilátero
120°
110°
• α = 166° 40'
200=180-360
0 =
26-360
360=20
ひ=360
20
18 J
60°
⚫a=169° 42' 51.43"
169.4143180-340
0 = 10.29 54-360
360 10.2857
2=360
10.2857
@Sa
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