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Aleksandr [31]
4 years ago
9

Item 8

Mathematics
1 answer:
ludmilkaskok [199]4 years ago
8 0
So, I didn't quite understand your question clearly, but I'll try my best to answer it.

So, the first question is quite simple: Did the runner have a % decrease in his time or an increase.
Well, 7:45 is minor than 5:51. So, his time decreased.

2nd question:
The percent of change. Well, first things first 7:45 has 2 different units, wich are minutes and seconds, I suppose. Same goes for 5:51.
So let's put everything in seconds. multiply both the 7 and 5 for 60(for every minute has 60 seconds.)

That means:
7*60= 420+45 = 465.
5*60=300+51=351.

Now, let's do the math itself:
465 -> 100%
351 -> x%
 Is equal to about  75,5%
How much did it decrease then?
(75,5-100)%= 24,5%, approximately

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A new car is purchased for $23,700 the value of the car depreciates at 13. 5% per year what will the value the car be to the nea
murzikaleks [220]

Answer:

Compound interest

$5557.88

Step-by-step explanation:

Everything starts at 100% and since it depreciates you subtract 13.5 from 100 =86.5% now we want percentage as a decimal so we divide by 100=0.865 our multiplier

Now you have the original amount that you purchased for times by the multiplier to the power of number of years=10

23700 times 0.865 power of 10

=5557.88

3 0
2 years ago
What is<br> as a decimal rounded to 3 decimal places?
puteri [66]
“Three decimal places” is the same as “the nearest thousandth.” So, for example, if you are asked to round 3.264 to two decimal places it means the same as if your are asked to round 3.264 to the nearest hundredth. Some questions, like the example below, will ask you to “show your answer correct to two decimal places."
7 0
3 years ago
An arc on a circle measures 295°. The measure of the central angle
marishachu [46]

Answer:

59/36π

Step-by-step explanation:

We know that an angle is measured in either degrees or radians and The arc's angle measurement, taken at the center of the circle the arc is part of, is measured in degrees (or radians)

Let's convert 90 degrees into radians

295° = 295 * π/180 = 59/36π

4 0
3 years ago
Please Help I am Confused
chubhunter [2.5K]

Answer: C, x^2 x y^2 = z^2

Step-by-step explanation:

Pythagorean theorem

5 0
3 years ago
Increase 140g by 12.5%
blsea [12.9K]
12.5% of 140g is 17.5      
add that to 140 and you get 157.5g
4 0
3 years ago
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