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VLD [36.1K]
3 years ago
14

Pre calculus help!! pH of substance which has a hydronium ion concentration? help please!!

Mathematics
1 answer:
disa [49]3 years ago
7 0

-log(5.4x10^-9) = 8.27 = 8.3

 since 8.3 is greater than 7 it is basic

so the last answer is correct

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A scale drawn on the map shows that 1 inch represents 20 miles. If two cities
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Answer:

50 miles

Step-by-step explanation:

20 multiplied by 2.5 = 50

8 0
2 years ago
Simplify 2 (8r2+r)-4r
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16r^2+ 2r -4r 16r^2 - 2r 2r ( 8r -1)
4 0
2 years ago
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The probability that a can of paint contains contamination is 3.23%, and the probability of a mixing error is 2.4%. The probabil
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Answer:

4.6%.

Step-by-step explanation:

The probability that a can of paint contains contamination(C) is 3.23%

P(C)=3.23%

The probability of a mixing(M) error is 2.4%.

P(M)=2.4%

The probability of both is 1.03%.

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We want to determine the probability that a randomly selected can has contamination or a mixing error. i.e. P(C \cup M)

In probability theory:

P(C \cup M) = P(C)+P(M)-P(C \cap M)\\P(C \cup M)=3.23+2.4-1.03\\P(C \cup M)=4.6\%

The probability that a randomly selected can has contamination or a mixing error is 4.6%.

3 0
3 years ago
3z2 - 2z + 8 <br> -<br> (10z2 +7z - 12)
klemol [59]

Answer: 7z²-9z+20

Step-by-step explanation:

PEMDAS - Please Excuse My Dear Aunt Sally - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

4 0
3 years ago
Simplify 5y^2 + 5y + 5y + 5x^2.
Ierofanga [76]

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5y^2 + 10y + 5x^2

Step-by-step explanation:

there's only two like terms that can be combined.

4 0
3 years ago
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