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AnnyKZ [126]
3 years ago
5

A dance club ordered shoes for all of its members. The shoe sizes are shown in the table.

Mathematics
2 answers:
Kamila [148]3 years ago
5 0
The sample mean is the sum of the sample values divided by the number of them:
  (7 +7 +10 +6 +9 +6 +8 +7.5 +8.5 +8)/10 = 77/10 = 7.7

The sample mean is 7.7.
Olegator [25]3 years ago
5 0

Answer:

The sample mean of the data is:

7.7

Step-by-step explanation:

The sample mean is the sum of all sample observations divided by the number of sample observations.

Let sample mean=x

x=(7 +7 +10 +6 +9 +6 +8 +7.5 +8.5 +8)/10

x= 77/10

x= 7.7

Hence, the sample mean of the data is:

x=7.7

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Contact [7]
1) surface of a rectangular prism=2(length x width)+2(length x height)+2(width x height)

Therefore:
148 cm²=2(5 cm x 4 cm)+2(5 cm x h)+2(4 cm x h)=
148 cm²=40 cm²+10 cm h+8 cm h
18 cm h=148 cm²-40 cm²
18 cm h=108 cm²
h=108 cm² / 18 cm=6 cm.

answer: height=6 cm 

2)
Volume of a rectangular prism= length x width x height 
therefore:
34 cm³=(1.7 cm)(0.5 cm) h
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3)
volume of a cylinder: πr²h
therefore.
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r=√(118.79 ft³/5π ft)≈2.75 ft

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4)
 
Surface area of the pyramid with square base=4(A side)+A base
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surface area=4(48 ft²)+64 ft²=256 ft²

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5)
surface of a cone=πrs+πr²
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radius=diameter/2=6.2 ft/2=3.1 ft
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s=33.109 ft² /3.1π ft
s≈3.4 ft

Answer: the slant height would be 3.4 ft.

6)
volume of a square pyramid=(area of base x heigth)/3
therefore:
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7)
volume of a cone =(base x height)/3
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