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Maksim231197 [3]
3 years ago
7

How many ways can teacher arrange 4 students in front row of class with 30 students

Mathematics
2 answers:
harina [27]3 years ago
8 0
30 choices for first seat
29 for 2nd
28 for 3rd
27 for 4th

answer is 30*29*28*27=657720 ways
Cloud [144]3 years ago
6 0
Choose 4 students from 30 
means 30P4
657720
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2 years ago
The cost of oranges varies directly as the number of oranges sold. If 8 oranges cost $10.40, how many oranges can be bought for
alexdok [17]

Answer:

26

Step-by-step explanation:

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6 0
2 years ago
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This composite shape is a rectangle with a semicircle attached on one end. The diameter of the semicircle is 6 feet.
Ugo [173]

As we can see on the picture we have a rectangle and half of circle.

The areas for half circle and rectangle are:

A_{rectangle}=a\cdot b \\A_{halfcircle}=\frac{A_{circle}}{2}=\frac{\pi r^2}{2}

The area of the figure is the sum of the area of half circle and rectangle. Also the height of a rectangle (6ft) is a diameter of a half circle therefore the radius of half circle is 6ft ÷ 2 = 3ft.

Now we calculate the areas.

A_{rectangle}=10\cdot 6=\underline{60} \\A_{halfcircle}=\frac{3.14\cdot3^2}{2}=\underline{14.13} \\A_{total}=A_{rectangle}+A_{halfcircle} =60+14.13=\boxed{74.13\approx74}

The area of the figure is approximately 74ft squared.

Hope this helps.

r3t40

3 0
2 years ago
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company A sold 6,028,468 cans of corn during the last three months. What is the value of the digit 4 in the number 6,028,468?
balu736 [363]
The value of the digit 4 in the number 6,028,468 is 100
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2 years ago
Find the volume of a box that has a length of 7 cm, a width of 9 cm, and a height of<br> 11.2 cm.
astra-53 [7]
The answer is 705.6 cm^3.

Remember that volume of a box, rectangular prism, is: V = LWH.

So, V = 7(9)(11.2) = 705.6 cm^3
8 0
3 years ago
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