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Elena-2011 [213]
3 years ago
13

Simon makes 30 cakes

Mathematics
1 answer:
tankabanditka [31]3 years ago
5 0

Answer:

21

Step-by-step explanation:

10% of 30 is 3 then 1/5 of 30 is 6 so 3+6=9 then 30-9=21

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Estimate the area of Alberta in square miles. Show your reasoning
ella [17]

Answer:  About 278,250\ mi^2

Step-by-step explanation:

The missing figure is attached.

Notice in the first picture that Alberta has a complex shape.

You can calculate the area of a complex shape by decomposing it into polygons whose areas can be calculated easily.

Observe the second picture. Notice that it can be descompose into two polygons: A trapezoid and a rectangle.

The area of the trapezoid  can be calcualted with the formula:

A_t=\frac{h}{2}(B+b)

Where "h" is the height, "B" is the long base and "b" is short base.

And the area of the rectangle can be found with the formula:

 A_r=lw

Wkere "l" is the lenght and "w" is the width.

Then, the apprximate area of Alberta is:

A=\frac{h}{2}(B+b)+lw

Substituting vallues, you get:

A=(\frac{(410\ mi-180\ mi)}{2})(760\ mi+470\ mi)+(180\ mi)(760\ im)\\\\A=141,450\ mi^2+136,800\ mi^2\\\\A=278,250\ mi^2

Therefore, the area of of Alberta is about 278,250\ mi^2.

5 0
3 years ago
allison uses 3 out of 5 of a bag of suger to bake 4 small cakes.what fraction of a bag of sugar was used in each cake?
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Hi! i don’t really understand this question. if someone could help me i’d appreciate it!
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Answer:

Step-by-step explanation:

cute it into separate parts then add the areas together

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