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o-na [289]
3 years ago
15

100 people are running a marathon. How many different ways can the runners finish 1st, 2nd, and 3rd place?

Mathematics
1 answer:
andrew11 [14]3 years ago
3 0

Answer:

970,200

Step-by-step explanation:

In a 100 man race, how many runners have the chance to finish first?

Answer 100.

Now that 1 person is first, how many runners could be second? Well, there are still 99 runners left, and any one of them could be second.

Answer 99.

How many can be third? Using the same idea as above, once one person is first and another is second, that leaves 98 people still running and trying for third. So how many can be in third?

Answer 98.

Now you need to do the math.

100 × 99 × 98 = 970,200

So there are 970,200 different ways.

Hope this helps!! Brainliest :) ?

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A baker needs 4 3⁄4 cups of flour. If she uses a 1 1⁄2 cup measuring scoop, how many scoops of flour must the baker use to have
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Answer:

If you did it three times it would be 4 1/2. If you wanted to make it at least 4 3/4 then you would need to do 1 1/2 4 times.

Step-by-step explanation:

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3 years ago
If the radius of circle is r cm.write domn the measurement of area of that circle​
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Square root of -125 in simplest radical form
djverab [1.8K]

Answer:

5√5

Step-by-step explanation:

Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.

5√5

5 0
3 years ago
CORRECT AND CLEAR ANSWER WILL BE GIVEN BRAINLIEST An object of mass 0.30 kg is thrown vertically upwards and reaches a height of
Natalka [10]

Answer:

Final potential energy = 24 Joule

The velocity with which object must be thrown = 4 \sqrt{10} m/s

Step-by-step explanation:

<u>Given:</u>

Mass of object, m = 0.30 Kg

Height of object, h = 8 m

Acceleration due to gravity, g = 10 ms^{-2}

a) Formula for Potential Energy:

E_p =mgh

Where m is the mass of object

g is acceleration due to gravity and

h is the height of object

Putting the values of m, g and h

E_p = 0.3 \times 10 \times 8\\\Rightarrow E_p =24 J

b) Formula for initial and final velocity:

v^{2}   =u^{2} +2gh

where v is the final velocity

u is the initial velocity with which the object is thrown

g is acceleration due to gravity and

h is the height obtained by object

here v = 0 at the height 8 m because it will come to rest at the point it attains the maximum height.

h = 8m

g = -10 ms^{-2} (negative because the object's velocity is decreasing)

Putting the values to find 'u':

0^{2}   =u^{2} +2 \times -10 \times 8\\\Rightarrow u^{2} = 160\\\Rightarrow u = 4 \sqrt{10}\ m/s

7 0
3 years ago
Kathleen worked for 4 hours and 45 minutes. How should she write that on her time card?
Yuri [45]

Answer:

4.75 hours.

Step-by-step explanation:

We have been given that Kathleen worked for 4 hours and 45 minutes.

We will convert 45 minutes to hours by dividing 45 by 60 as one hour has 60 minutes.

\frac{\text{45 minutes}}{\frac{60\text{ minutes}}{\text{hour}}}

\frac{\text{45 minutes}}{60}\times \frac{\text{ hour}}{\text {minutes}}

\frac{3}{4}\times \text{ hour}

0.75\text{ hour}

Therefore, she should write 4.75 hours on her time card.

6 0
3 years ago
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