The function of f(n) = log 0.98(n/50) models the time, f(n), in minutes, required for the concentration of a certain chemical to
reach a value of n milligrams/liter during a reaction.
Which statements about the reaction are supported by the graph? (More than one answer)
A. The concentration of the chemical decreases as the reaction progresses over time.
B. The concentration of the reactant is 50 milligrams/liter at the start of the reaction.
C. The concentration of the chemical cannot exceed 50 milligrams/liter.
D. The concentration of the chemical increases as the reaction progresses over time.
E. The concentration of he reactant is 160 milligrams/liter at the start of the reaction.
Which statements about the reaction are supported by the graph? (More than one answer)
A. The concentration of the chemical decreases as the reaction progresses over time.
B. The concentration of the reactant is 50 milligrams/liter at the start of the reaction.
C. The concentration of the chemical cannot exceed 50 milligrams/liter.
D. The concentration of the chemical increases as the reaction progresses over time.
E. The concentration of he reactant is 160 milligrams/liter at the start of the reaction.
2 answers:
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The missing coordinate r is 11.
Solution:
Given points are (–15, 1) and (–7, r).
Slope (m) =
<u>To find the missing coordinate r:</u>
Slope formula:
Substitute the given values in the formula.
Do cross multiplication.
40 = 4r – 4
Add 4 on both side of the equation.
44 = 4r
Divide by 4 on both side of the equation.
11 = r
⇒ r = 11
Hence the missing coordinate r is 11.
Answer:
x = 9.5
Step-by-step explanation:
Given
=
( cross- multiply )
3(4x - 6) = 4(2x + 5) ← distribute parenthesis on both sides
12x - 18 = 8x + 20 ( subtract 8x from both sides )
4x - 18 = 20 ( add 18 to both sides )
4x = 38 ( divide both sides by 4 )
x = = 9.5