Answer:
A=ε*l*c
A= 2- log₁₀ % T
Step-by-step explanation:
There is a linear relationship between the concentration of a sample and absorbance according to Beer-Lambert Law.
A=ε*l*c
where;
A=absorbance
ε=absorption coefficient
l=path length
c=concentration
Because % transmittance is transmittance value multiplied by 100 then, the equation that will allow us calculate absorbance from % transmittance value will be;
A= 2- log₁₀ % T where T is transmittance.
Elimination:
7x - 3y = 20
5x + 3y = 16
(add)
12x = 36
÷ 12
x = 3
(5 × 3) + 3y = 16
15 + 3y = 16
- 15
3y = 1
÷ 3
y = 1/3
Substitution:
5x + 3y = 16
- 3y
5x = 16 - 3y
÷ 5
x = 3.2 - 0.6y
5(3.2 - 0.6y) + 3y = 16
16 - 3y + 3y = 16
16 = 16
- 16
6y = 0
÷ 6
y = 0
Sorry the substitution messed up for some reason, I'll fix it after I've answered the other question
V=4/3 pi r^3.
4/3r^3=1372/3,......r^3=343, r=7 inches
[ Answer ]

[ Explanation ]
- Solution To Inequality: - 6x + 5 > -1
-------------------------------------
- Subtract 5 From Both Sides
- 6x + 5 - 5 > -1 - 5
-6x > -6
- Multiply Both Sides By -1 (Reverse Inequality)
(-6x)(-1) < (-6)(-1)
6x < 6
< 
X < 1
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6 3/4= 6.75
80 mph * 6.75 hours = 540 miles total
Final answer: 540 miles