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3 years ago

5

Brian rented a truck for one day. there was a base fee of $18.99 , and there was an additional charge of 75 cents for each mile

driven. brian had to pay $110.49 when he returned the truck. for how many miles did he drive the truck?

1 answer:

Taya2010 [7]3 years ago

4 0

He drove 122 miles
hope this helps :)

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In a pizza store, there are six possible toppings. On a large pizza, you can have 3 toppings. How many combinations of pizza top

valina [46]

Answer:

20

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2 years ago

Kasey has three pieces of wood that measure 9 inches, 12 inches, and 21 inches. Can she make a right triangle

Harrizon [31]

Answer: No

Step-by-step explanation:

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3 0

3 years ago

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2. The alkalinity of a fluid (pH) can be modeled in terms of its hydrogen ion concentration (H+, measured in moles/liter) of the

nataly862011 [7]

Given the equation:

$pH=-log\mleft(H^+\mright)$

You know that a lab technician finds that a sample of fluid has this pH:

$pH=4.5$

Then, in order to find the hydrogen ion concentration of the fluid, you need to follow these steps:

1. Substitute the pH given in the exercise into the equation:

$4.5=-log(H^+)$

Multiply both sides by -1:

$-4.5=\log (H^+)$

2. Solve for:

$H^+$

Remember that, by definition:

$\log _b\mleft(c\mright)=a\Rightarrow b^a=c$

In this case, you can identify that:

$\begin{gathered} a=-4.5 \\ b=10 \\ c=H^+ \end{gathered}$

Hence, substituting values and simplifying, you get:

$\begin{gathered} b^a=c \\ 10^{-4.5}=H^+ \\ H^+=0.00003162278\text{ }\frac{moles}{liter} \end{gathered}$

Therefore, the answer is:

$H^+=0.00003162278\text{ }\frac{moles}{liter}$

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1 year ago