Jane uses a jar to save her money. She saves $10 from her weekly allowance in the 1st week, $12 in the 2nd week, $14 in the 3rd week, and so on. How much money will she have saved in 10 weeks?
This is an AS with
a=10
d=2
So,
S10 = 10/2(2*10+9*2) = 190
To find out how much money Jane will have saved in 10 weeks, we need to determine the pattern in her savings.
We can observe that the amount she saves each week increases by $2. So, for each week, the amount saved can be calculated using the formula:
Amount saved = $10 + ($2 * Number of weeks)
Using this formula, we can calculate the amount saved in the 10th week:
Amount saved = $10 + ($2 * 10)
Amount saved = $10 + $20
Amount saved = $30
Therefore, Jane will have saved $30 in 10 weeks.