Answer: The running speed of Elena is 5 miles/hour and this can be determined by using the formula of speed.
Step-by-step explanation:
A circular running track 1/4 is a mile long.
Elena runs on this track, completing each lap in 1/20 of an hour.
Speed formula is used to determine the speed of Elena. The formula of speed is given by:
----- (1)
where S is the speed, D is the distance and T is the time taken by Elena to run a circle.
Now, put the value of distance D and time T in the equation (1).
Speed = 5 miles/hour
Therefore, the running speed of Elena is 5 miles/hour.
For more information, refer to the link given below:
brainly.com/question/22610586
Answer:
-1.5
Step-by-step explanation:
Answer:
Accumulated amount will be $2504.90.
Step-by-step explanation:
Formula that represents the accumulated amount after t years is
A = 
Where A = Accumulated amount
= Initial amount
r = rate of interest
n = number of times initial amount compounded in a year
t = duration of investment in years
Now the values given in this question are
= $1000
n = 12
r = 4.6% = 0.046
t = 20 years
By putting values in the formula
A = 
= 
= 
= 1000×2.50488
= 2504.88 ≈ $2504.90
Therefore, accumulated amount will be $2504.90.
If you use a calculator to find the exact decimal of these fractions, you can easily find this out.
2/3 as a decimal equals: 0.6666 (repeating sixes)
7/8 as a decimal equals: 0.875
0.875 > 0.666
7/8 > 2/3
7 over 8 is greater! Hope this helps! :)
The solution to the given equation –2|u| = –68 is u = 34, -34.
<h3>What is the solution to the equation?</h3>
Given the equation in the question;
–2|u| = –68
To find u, divide both sides by -2
–2|u| = –68
(–2|u|)/2 = (–68)/-2
|u| = 34
Remove the absolute value term, this create ± on the right side of the equation. ( |x| = ±x )
u = ±34
Hence,
u = 34, -34
Therefore the solution to the given equation –2|u| = –68 is u = 34, -34.
Learn more about absolute values here: brainly.com/question/1301718
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