at devons new job he spent $12.99, $10.50, $9.89, $6.90, and $7.58 on lunch the first week. in the second…

at devons new job he spent $12.99, $10.50, $9.89, $6.90, and $7.58 on lunch the first week. in the second week, he spent $2 more in total for the 5 lunches than the first week. what is the increase in the mean for the second week compared to the first? round the answer to the nearest penny. enter your answer in the box. $

at devons new job he spent $12.99, $10.50, $9.89, $6.90, and $7.58 on lunch the first week. in the second week, he spent $2 more in total for the 5 lunches than the first week. what is the increase in the mean for the second week compared to the first? round the answer to the nearest penny. enter your answer in the box. $

Answer

Explanation:

Step1: Calculate first - week total

Add up the first - week lunch costs: $12.99 + 10.50+9.89 + 6.90+7.58=47.86$.

Step2: Calculate first - week mean

The mean of the first - week costs is $\frac{47.86}{5}=9.572$.

Step3: Calculate second - week total

The second - week total is $47.86 + 2=49.86$.

Step4: Calculate second - week mean

The mean of the second - week costs is $\frac{49.86}{5}=9.972$.

Step5: Calculate the increase in mean

Subtract the first - week mean from the second - week mean: $9.972−9.572 = 0.4$.

Answer:

$0.40$