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2 years ago

Anyone know this and can help?!

Mathematics

1 answer:

DENIUS [597]2 years ago

7 0

Answer:

65.4°

Step-by-step explanation:

According to question

The equation is

Cos(x)=5/12

x=acos(5/12)

x=65.4°

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Ribbon is sold at 3 yards for $6.33. Jackie bought 24 yards of ribbon for a project. How much did she pay?

sergey [27]

151.92

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3 years ago

choli [55]

Answer:

5/2

Step-by-step explanation:

ratio of sides=(√25)/(√4)=5/2

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3 years ago

The time between arrivals of customers at an automatic teller machine is an exponential random variable with a mean of 4 minutes

andre [41]

Answer:

0.7788 = 77.88% probability that more than three customers arrive in 10 minutes

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, we have that:

The time between arrivals of customers at an automatic teller machine is an exponential random variable with a mean of 4 minutes, and we have three customers, which means that $m = 3*4 = 12, \mu = \frac{1}{12} = 0.0833$

(a) What is the probability that more than three customers arrive in 10 minutes

This is P(X > 3). So

$P(X > 3) = e^{-0.0833*3} = 0.7788$

0.7788 = 77.88% probability that more than three customers arrive in 10 minutes

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3 years ago

To convert a temperature for degrees Celsius to degrees Fahrenheit, the temperature in degrees Celsius is multiplied by 1.8, and

Sergio [31]

Answer:

Step-by-step explanation:

1.8C + 32 would be ur expression

when C = 25

F = 1.8C + 32

F = 1.8(25) + 32

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3 years ago

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Snowcat [4.5K]

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$d = 64km*7.5$

$d = 480km$

Therefore, a car would tracel 480 km.

5 0

3 years ago

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