<u><em>Answer:</em></u>
Elena's running speed is 5 miles/hour
<u><em>Explanation:</em></u>
The speed is defined as the covered distance per unit time
<u>In the problem, we have:</u>
The distance covered is the length (circumference) of the circular track which is given as of a mile.
We are also given that she completes each lap (she completes of a mile) in of an hour
To get her speed, we will divide the distance covered by the time taken to cover this distance
<u>This is done as follows:</u>
speed = miles/hour
<u>This means that:</u>
Elena can run 5 miles each hour
Hope this helps :)
Answer:
3/5
Step-by-step explanation:
7/15 + 2/15 = 9/15
both 9 nad 15 are divisible by 3
9/15 = 3/5
Formula for Riemann Sum is:
interval is [1,3] so a = 1, b = 3
f(x) = 3x , sub into Riemann sum
Continue by simplifying using properties of summations.
Now you have an expression for the summation in terms of 'n'.
Next, take the limit as n-> infinity.
The limit of
goes to 0, therefore the limit of the summation is 12.
The area under the curve from [1,3] is equal to limit of summation which is 12.
Answer:
OD
Step-by-step explanation: