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3 years ago

Hv no idea how to do this

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

5 0

Answer:

477

Step-by-step explanation:

It's pretty simple. All you need to calculate is how much they made in the 9 hours. So multiply 58 x 9 and you get 522. Then take away what they didnt make, which was 45. That gives you 477.

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Can someone please help me with math.

Tcecarenko [31]

For question 9 the answer is option D.63cm

$\pi x 3^2 x 7= 197.92\\$

$197.92/Pi=62.77$ Which would get rounded up to 63cm^2

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3 years ago

You buy four packages of shoelaces. You pay with a $10 bill and receive $3.24 in change. Determine the price of each package.

Mnenie [13.5K]

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3 years ago

The commute time for people in a city has an exponential distribution with an average of 0.5 hours. What is the probability that

mamaluj [8]

Answer:

0.314 = 31.4% probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

The probability of finding a value higher than x is:

$P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}$

In this question:

$m = 0.5, \mu = \frac{1}{0.5} = 2$

What is the probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours?

$P(0.4 \leq X \leq 1) = P(X \leq 1) - P(X \leq 0.4)$

In which

$P(X \leq 1) = 1 - e^{-2} = 0.8647$

$P(X \leq 0.4) = 1 - e^{-2*0.4} = 0.5507$

$P(0.4 \leq X \leq 1) = P(X \leq 1) - P(X \leq 0.4) = 0.8647 - 0.5507 = 0.314$

0.314 = 31.4% probability that a randomly selected person in this city will have a commute time between 0.4 and 1 hours

4 0

3 years ago

A regular hexagon has a radius of 20 in. What is the approximate area of the hexagon?

lawyer [7]

Answer:

1,038 in2

Step-by-step explanation:

In a regular hexagon, the radius and side length are equal in length... That makes the answer 1038 in.2 correct?

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sukhopar [10]

Answer:

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Step-by-step explanation:

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