2 years ago

If 25 articles cost $43.75 how much does each cost?

Mathematics

1 answer:

quester [9]2 years ago

8 0

Answer:

$1.75

Step-by-step explanation:

I had this question and got it right!

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jok3333 [9.3K]

Answer:

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Step-by-step explanation:

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3 years ago

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. Which equation models t

Elden [556K]

$\bf \textit{Logarithm Cancellation Rules}
\\\\
log_a a^x = x\qquad \qquad \boxed{a^{log_a x}=x}\\\\
-------------------------------\\\\
pH=-log(H+)\qquad \stackrel{pH}{7.2}=-log(H+)\implies -7.2=log_{10}(H+)
\\\\\\
10^{-7.2}=10^{log_{10}(H+)}\implies 10^{-7.2}=H+\implies \cfrac{1}{10^{7.2}}=H+$