What would be the order?
1 answer:
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Answer: Step 5
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Reason:
The order of operations is PEMDAS
- P = parenthesis
- E = exponents
- M = multiplication
- D = division
- A = addition
- S = subtraction
The multiplication and division are on the same level of precedent, and the same goes for addition and subtraction. Some math textbooks may refer to PEMDAS as BODMAS, which is basically the same thing.
Notice how division comes before addition. So we must compute the portion first before adding in step 4.
This is what steps 4 and onward should look like
So that's why the error is in <u>step 5</u>
If there was parenthesis around the "2+10", and we had , then step 5 given by your teacher would be correct.
Answer: 1.018
Step-by-step explanation:
The pH level of a substance indicates the concentration of hydrogen ions () in a solution and is calculated by:
In this case the hydrogen ion concentration is , where
. Hence:
This means this new substance is acid