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3 years ago

A customer at the cafe is charged $4.60 for her time on the internet. How many hours was she on the internet?

Mathematics

1 answer:

Delicious77 [7]3 years ago

8 0

Answer:

It doesn't give enough information to even answer this question because you would have to know when the cafe opens and closes and even if i knew that, how do i know when she arrived there. Alot of wrong in this question honestly

Step-by-step explanation:

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Makovka662 [10]

Answer:

Step-by-step explanation:

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3 years ago

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In triangle ABC shown, DE || AC. What is the length of AC?

Aliun [14]

Answer:

AC = 20

Step-by-step explanation:

Δ BDE and Δ BAC are similar, so the ratios of corresponding sides are equal, that is

$\frac{AC}{DE}$ = $\frac{BA}{BD}$ , substitute values

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Scorpion4ik [409]

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3 years ago

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loris [4]

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3 years ago

The formula for the circumference of a circle is c=pi d, where d is the length of the diameter. If d is a rational number, what

tensa zangetsu [6.8K]

Answer:

The circumference is an irrational number.

Step-by-step explanation:

$\pi$ is an irrational number, multiplying $\pi$ by a rational number different from 0 will give as a result an irrational number. This is because if that is not the case, then there would exist rational numbers a and b, with a different from 0, such that $\pi *a = b$ , then $\pi = \frac{b}{a}$ .

Since the quotient of two rational numbers is a rational number, if b and a were rational, then $\pi$ should also be rational, which is not the case.

We conclude that, since the diameter is positive and rational, that the circumference cant be rational, therefore it is irrational.

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