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3 years ago

Geo question

Mathematics

1 answer:

yanalaym [24]3 years ago

4 0

I’m pretty sure your answer is B

if the sides of a square aren’t congruent then it’s not actually a square

hope this helps:)
brainliest?

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It costs $15.50 per hour to rent a scooter and $22.80 per hour to rent a watercraft. Use the expression 15.5s + 22.8w to determi

Shtirlitz [24]

Answer:

94.15

Step-by-step explanation:

15.5 x 3.5= 54.25

22.8 x 1.75= 39.9

54.25+39.9=94.15

5 0

3 years ago

A person's blood pressure is monitored by taking 4 readings daily. The probability distribution of his reading had a mean of 13

ss7ja [257]

Answer:

a) Mean = 133, Standard deviation = 2.5

b) Normal distribution

c) 0.0026

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 4

Mean = 133

Standard deviation = 5

a) Mean and the standard deviation of the sampling distribution of the sample mean for the four observations each day.

The sampling distribution has a mean equal to the population mean

$\bar{x} = \mu = 133$

The standard deviation of the sampling distribution is given by:

$\sigma_s = \dfrac{\sigma}{\sqrt{n}} = \dfrac{5}{\sqrt{4}} = 2.5$

b) Shape of the sampling distribution

Central limit theorem:

When a large sample is drawn from a normal distribution, then the distribution of sample means approaches a normal distribution.

Since the distribution is normal, the sampling distribution of the sample mean will be bell shaped and follow a normal distribution.

c) P(sample mean exceeds 140)

$P( x > 140) = P( z > \displaystyle\frac{140 - 133}{2.5}) = P(z > 2.8)$

$= 1 - P(z \leq 2.8)$

Calculation the value from standard normal z table, we have,

$P(x > 140) = 1 - 0.9974 = 0.0026$

0.0026 is the probability that the sample mean exceeds 140.

6 0

3 years ago

Rolling an odd number on a number cube containing numbers 1 through 6

spayn [35]

Probability of rolling an odd number would be 50% or 1/2
Half of the numbers on the cube are even so the other half are odd.
Also, what you roll previously does not affect your next number in this situation.

8 0

3 years ago

Read 2 more answers

Numbers 19 and 21 please

Svetllana [295]

Make a predicton about a divison her friend royn and susana
predicton is what do you think about división

4 0

3 years ago

What percent of 80 is 90?

Pie

<h2>Answer:</h2>

112.5%

<h2>Step-by-step explanation:</h2>

100% = 80 - first, you have to write down, what is 100%

1% = 80/100 - than, you need to find out, what is 1% of 80

1% = 0.8

90/0.8 = 112.5% - last step is dividing 90 by 1% of 80

6 0

4 years ago

Read 2 more answers