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il63 [147K]
3 years ago
8

Some children hold a bake sale for a local charity, and raise $90. 10% comes from selling biscuits. 50% of the remaining money c

omes from chocolate cakes. How much is made from selling chocolate cakes?
Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0

Answer:

$40.5

Step-by-step explanation

10% comes from selling biscuit:$ 9

remaining money: $81

50% of the remaining money comes from chocolate cakes: 81*50%=$40.5

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\bf \cfrac{2x^4-x^3-15x^2+3x}{x+3}\\\\
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\begin{array}{r|rrrrrrrrrl}
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Answer:

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b)

Class Limits  Class Boundaries   Midpoint    f      Rf         Cf

10 - 37            9.5-37.5                   23.5            7     0.096     7      

38 - 65           37.5-65.5                 51.5           25    0.342     32    

66 - 93           65.5-93.5                 79.5          26    0.356     58    

94 -  121        93.5-121.5                   107.5         9     0.123       67    

122 - 149      121.5-149.5                  135.5         5      0.068     72  

150 - 177       149.5-177.5                  163.5        0         0.0      72    

178 - 205       177.5-20.5                  191.5         1       0.014      73  

Total                                                                  73          1.0    

c)

The histogram is in attached file.

Step-by-step explanation:

a)

The width of class interval=range/desired number of classes

The width of class interval=(maximum-minimum)/7

The width of class interval=(200-10)/7

The width of class interval=190/7

The width of class interval=27.14=28 (rounded to next whole number)

Part(b) and part (c) is explained in attached word document.

Download docx
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