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Aleks04 [339]
2 years ago
7

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

selling the twenty four yards at six dollars and thirty three cents 24 x 6.33 =

8 0
3 years ago
two similar figures have an area of 25 in^2 and 4 in^2, what is the ratio of the corresponding sides?
choli [55]

Answer:

5/2

Step-by-step explanation:

ratio of sides=(√25)/(√4)=5/2

7 0
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

6 0
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

F = 45 + 32

F = 77 degrees <====

6 0
3 years ago
At a rat of 64 kilometers per hour, how far will a car travel in 7 1/2 hours?_______
Snowcat [4.5K]

We use the formula d = s*t where d is distance, s is speed and t is time.

d = 64km*7.5

d = 480km

Therefore, a car would tracel 480 km.

5 0
3 years ago
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