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rosijanka [135]
2 years ago
5

Ruth spent 12 minutes on the phone while routing 4 phone calls. In all, how many phone calls does Ruth have to route to spend a

total of 18 minutes on the phone? Solve using unit rates.
Mathematics
1 answer:
Naily [24]2 years ago
5 0

Answer:

6 calls

pls mark brainliest if possible

Step-by-step explanation:

12 min/4 phone calls

unit rate: 3 min per phone call

c=#of calls

3c = 18

c=6

6 calls

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Let z denote a random variable that has a standard normal distribution. Determine each of the probabilities below. (Round all an
Lorico [155]

Answer:

P(Z < 2.37) = 0.9911.

Step-by-step explanation:

We are given that Let z denote a random variable that has a standard normal distribution.

Let Z = a random variable

So, Z ~ Standard Normal(0, 1)

As we know that the standard normal distribution has a mean of 0 and variance equal to 1.

                          Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = mean = 0

           \sigma = standard deviation = 1

Now, the probability that z has a value less than 2.37 is given by = P(Z < 2.37)

        P(Z < 2.37) = P(Z < \frac{2.37-0}{1} ) = P(Z < 2.37) = 0.9911

The above probability is calculated by looking at the value of x = 2.37 in the z table which has an area of 0.9911.

4 0
3 years ago
Can someone help me with this question
Molodets [167]
16 nickles
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2 years ago
Before Anna's dance routine ends, Anna earns 75 points and loose 30 points. Wtite and solve an expression to find Anna's final s
tatyana61 [14]
Earns 75= 75

Loose 30= -30

75-30= 45

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Hope this helps!
6 0
3 years ago
Is 3√ a irrational number
umka2103 [35]

Im going to assume that 3√ is √3

And √3 is irrational because You cant square root it without getting nuked with a Random Number generator of decimals.

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3 years ago
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