Step-by-step explanation:
The answer for third is D, you have multiple choice in fourth which I can't see at all...
Answer:
1. $67.72
2. It's correct.
Step-by-step explanation:
1.
bill: $68.89
discount: $10
tip: 15%
Calculate the total with the discount.
68.89-10=58.89
Now calculate 15% of that.
Convert 15% to decimal by dividing by 100

Multiply

Add this to the original amount.

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Calculate 20% of 148.25
Convert 20% to decimals by dividing by 100

Multiply
This is how much they will tip.
Add this to the original bill;

The percent error is 4.167 %
<em><u>Solution:</u></em>
Given that, Mrs Franklin's speedometer said she was driving at a rate of 48 miles per hour
When checking the accuracy of her speedometer, an Automotive Specialist recorded her speed at 50 miles per hour
<em><u>The percent error is given by formula:</u></em>
Percent error is the difference between a measured and known value, divided by the known value, multiplied by 100%

From given,
Experimental value = 50
Theoretical value = 48
<em><u>Substituting the values in formula, we get,</u></em>

Thus the percent error is 4.167 %
Step-by-step explanation:
if that's what you mean