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SashulF [63]
3 years ago
12

A shopping centre wants to examine the amount of space required for parking. Studies indicated that 50% of staff and shoppers us

e public transportation. A survey of 1002 was taken, and 483 responded that they used public transportation. At 5% level of significance, is it reasonable to conclude that the survey results indicate a change?
Mathematics
1 answer:
lbvjy [14]3 years ago
6 0

Answer:

The survey result doesn't indicate the change

Step-by-step explanation:

Previous study result is 50%

<u>Survey result:</u>

  • 483/1002 = 0.482 = 48.2%

<u>Comparing with previous result:</u>

  • 50% - 48.2% = 1.8% < 5%

Since this result is within 5% level of significance, it can be concluded that the survey result doesn't indicate the change

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skelet666 [1.2K]

Answer:

The solution of the first image is: b = √48

The solution of the second image is: c = √125

Step-by-step explanation:

Here we have two triangle rectangles, first, we need to remember the Pythagorean theorem.

For a triangle rectangle with cathetus A and B, and a hypotenuse H, we have the relationship:

A^2 + B^2 = H^2

Where H is the side that is opposite to the right angle (the angle of 90°)

In the first image, we can see that the hypotenuse is equal to 8, and one cathetus is equal to 4.

We want to find the value of b, that is the other cathetus.

Then we have:

4^2 + b^2 = 8^2

b^2 = 8^2 - 4^2

b^2 = 48

b = √48

Second image:

in this case, c is the hypotenuse, a and b are the cathetus.

We know that:

a = 5, b = 10

Then we have the equation:

a^2 + b^2 = c^2

Now we can replace the above values:

5^2 + 10^2 = c^2

25 + 100 = c^2

125 = c^2

√125 = c

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3 years ago
What is the value of x in the equation 3 / 2 (4x - 2) - 3x = 5 - (x + 2)? Please hurry.
OLga [1]

Answer:

<h2>x = 3/2</h2>

Step-by-step explanation:

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Collect like terms and simplify

6x - 3x + x = 5 - 2 + 3 \\ 4x = 6

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\frac{4x}{4}  =  \frac{6}{4}

simplify

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