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lesantik [10]
3 years ago
8

One of your friends lives 225 km away. It took him 2.5 hours to travel to the cottage. At what speed did he travel?

Mathematics
1 answer:
Dahasolnce [82]3 years ago
8 0
Speed = distance / time

given:
distance = 225 km and time = 2.5 hours

so
speed = 225 / 2.5 = 90 km per hour

Answer:
Speed = 90 km per hour
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7 0
3 years ago
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)

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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
7 x 3/4
Mkey [24]

7 3/4

Step 1: Multiply 7 and 4.

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Step 2:Add 3 to their product.

         28+3=31

Step 3:The number so obtained is the numerator and the denominator remains the same.

Answer: 31/4

I think that is what you are looking for!

Hope that helps!!!

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3 years ago
Marcus wants to use the Distributive Property to rewrite 28+72. Which expression could he use?
alexandr1967 [171]

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3 years ago
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Gekata [30.6K]
The answer is 47.3 x 2.5= 118.25
8 0
3 years ago
Read 2 more answers
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