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3 years ago

the circumference of a circle is 11.4mm. find the length of the diameter. give your answer rounded to 3SF.

Mathematics

1 answer:

kvasek [131]3 years ago

4 0

Answer:

3.627 = d

Step-by-step explanation:

C = 11.4mm

d = ?

C = πd

11.4 = 22/7 × d

cross multiply

11.4 ×7 = 22d

79.8 = 22d

Divide both sides of the equation b 22

79.8/22 = 22d/22

3.627 = d

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Step-by-step explanation:

Let x represent the number of pounds of blueberry granola that she should put in the mixture.

Let y represent the number of pounds of apple granola that she should put in the mixture.

She wants to make a 30 pounds mixture. This means that

x + y = 30

A store is selling a mixture of apple granola and blueberry granola for $6.99 per pound. This means that the cost of the 30 pound mixture would be

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Blueberry granola costs $8.99 per pound and apple granola costs $5.99. This means that

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Substituting x = 30 - y into equation 1, it becomes

8.99(30 - y) + 5.99y = 209.7

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y = - 60/ -3

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x = 30 - 20 = 10 pounds

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