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Inessa [10]
3 years ago
15

Yeoooo i need help 3-8, this stuff is due at 1:30 pm i’ll give y’all like 69 points or sum lol

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
3 0

Answer: Hi

Step-by-step explanation:

Can you take a better pic, then I help

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A map has a scale of 5 inches : 12 miles. if two cities are 13 inches apart on the map, what is the actual distance between the
emmasim [6.3K]
Set up a proportion that looks like 5/12 = 13/x with X being the actual distance between the cities if they are 13 inches apart on the map.

Then cross-multiply to get 5x = 156. Divide by 5 to isolate the X and get X = 31.2

The cities are a distance of 31.2 miles apart.

I'm guessing your question cut off where you put to the nearest... and you mean to round to the nearest whole number in which case your answer would be just 31 miles apart. 
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Logarithm 2. The alkalinity of a fluid (pH) can be modeled in terms of its hydrogen ion concentration (H^+,measured in moles/lit
makkiz [27]

ok. We are given the following equation:

ph=-\log (H)

Where:

\begin{gathered} P=\text{ alkalinity} \\ H=\text{ hydrogen ion concentration} \end{gathered}

Since we are asked to determine "H" we will solve for "H" in the equation. To do that we will first multiply both sides by -1:

-ph=\log (H)

Now, we will use the following property of logarithms:

\log _aB=c\rightarrow B=a^c

Applying the property and having into account that:

\log (H)=\log _{10}(H)

We get:

10^{-pH}=H

Now we substitute the given value of "pH = 4.5":

10^{-4.5}=H

Solving the operation:

0.000032=H

Therefore, the hydrogen ion concentration of the fluid is 0.000032

7 0
1 year ago
If the given time series has a trend and seasonality, the most appropriate forecasting model to determine the forecast of the ti
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Answer:

Moving average model

Step-by-step explanation:

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3 years ago
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Answer:

25

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18 / 9 = 2 (Order of operations

2+3 = 5

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