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ale4655 [162]
3 years ago
7

the runner's time to complete the marathon is 45 minutes. The time to complete the last marathon was 49.5 minutes. What is the p

ercent decrease of the time ?
Mathematics
1 answer:
Lana71 [14]3 years ago
6 0

Answer:

9.09%

Step-by-step explanation:

To find percent decrease you have to use this equation:

Percent Decrease = \frac{Initial -New}{Initial} x 100

Initial = 49.5

New = 45

Plug in and solve:

PD = \frac{49.5-45}{49.5} x 100\\\\PD = \frac{4.5}{49.5} x 100 \\\\PD = 0.0909 x 100\\\\PD = 9.09

The percent decrease is 9.09%

<em>Hope this helps!!</em>

<em>- Kay :)</em>

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HELP<br> ASAP<br> 35 POINTS
IgorLugansk [536]

By finding the distance between each pair of consecutive vertices, we could find that the perimeter is 26.8

<h3>How to find the perimeter of the figure?</h3>

To find the perimeter, we need to find the length of each side of the figure in the image.

And remember that the distance between two points (a, b) and (c, d) is:

√( (a - c)^2 + (b - d)^2 )

So we need to find the distance between each of the vertices of the figure.

The first two are (0, 3) and (4, -1). The distance between these is:

d = √( (0 - 4)^2 + (3 + 1)^2 ) = √25 = 5

The second pair is (4, -5) and (4, -1). The distance between these is:

d = √( (4 - 4)^2 + (-5 + 1)^2 ) = √16 = 4

The third pair is (4, -5) and (-5, 4). The distance between these is:

d = √( (4 + 5)^2 + (-5 - 4)^2 ) = √162 = 12.7

The last pair is (-5, 4) and (0, 3), this time the distance is:

d = √( (-5 - 0)^2 + (4 - 3)^2 ) = √26 = 5.1

The perimeter is the sum of these distances:

5 + 4 + 12.7 + 5.1 = 26.8

By finding the distance between each pair of consecutive vertices, we could find that the perimeter is 26.8

If you want to learn more about perimeters:

brainly.com/question/24571594

#SPJ1

3 0
2 years ago
Use order of operations to evaluate the expression below. 11 x 9 + [ 15 - 9 ]
valentinak56 [21]

Answer:

105

Step-by-step explanation:

11 x 9 + [15 - 9]

First is brackets

= 11 x 9 + 6

then multiplication

= 99 + 6

then addition

= 105

6 0
3 years ago
Read 2 more answers
Plz plz guys solve this i will give you brainliest ​ with procedure
scoray [572]

Answer:

5:9

Step-by-step explanation:

1/5kg:360g

kg to g

1kg=1000g

1/5kg=1/5x1000

=200g

200g:360g

200g/360g

200/360

5/9

5:9

6 0
3 years ago
A storage bin is 12ft long 4ft wide 2ft high what is the volume in cubic ft
MariettaO [177]
Hello!

This is a rectangular prism

The equation to find the volume of a rectangular prism is

V = whl

v is volume
w is width
h is height
l is length

Put in the values you know

V = 12 * 4 * 2

Multiply

V = 96

The answer is 96 cubic feet

Hope this helps!
7 0
3 years ago
How is 340 divided by 17 reasonable
vivado [14]
17 goes into 34 two times

and goes into 0 zero times

So 340 / 17 = 20
8 0
3 years ago
Read 2 more answers
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