Answer:
168 girls
Step-by-step explanation:
420 × 0.40
= 168
When the calcium atom loses electrons, it's charge increases by the number of electrons lost.
It loses 2 electrons, so it's charge increases by 2.
The answer is +2
An inequality is used to show two values that are different and to show that the two values are unequal.
<h3>What is an Inequality?</h3>
This refers to the mathematical relation that is used to show the comparison between two numbers that are unequal.
We can note that because there is a previous record, for a person to beat the record, he would have to perform better than the record and be faster than the previous record holder.
Therefore, if a record of Amelia was given, this would be used to find the relation between her record and the current record of 37 sit-ups and how many weeks of training would be needed to break the record.
Hence, we can see that the question is incomplete so I gave you a general overview to help you get a better understanding.
Read more about inequalities here:
brainly.com/question/24372553
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