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MatroZZZ [7]
3 years ago
12

a librarian is interested in how many books an average visitor checks out. she keeps a tally of how many books are checked out b

y each visitor as she scans them. what type of sample is this?
Mathematics
1 answer:
defon3 years ago
6 0
The answer is convenience sample
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Scientific notation 20,000+3,400,000= an example to would be helpful
Viefleur [7K]
20 000 is as much as 20 * 1 000, so we can write it as: 20 * 10^3
3 400 000 is as much as 34 * 100 000, so we can write it as: 34 * 10^5

The sum in scientific notation would look like this:

20 * 10^3 + 34 * 10^5

I hope that's what you meant :)
4 0
4 years ago
Read 2 more answers
If the triangles in the figure are similar, what is the length of side b? A. 36 B. 40 C. 32.4 D. 45
butalik [34]
Since ABC and DEF are similar then we can write:.

CB/FE = CA/FD
9/90 = b/360
b/360 = 1/10
b = 360/10
b = 36
8 0
4 years ago
Read 2 more answers
I'm confused on this​
noname [10]

Answer:

AB = 33.78228208

BD = 42.3

AT= 20.33068487

Area= 859.9879701

Step-by-step explanation:

Using the sin rule:

<u>sinA </u> = <u>sinB</u>

a b

If I use A = 90, a= 42.3

B = 53, b= AB

I get AB = 33.78228208 units

Then the diagonal is already 42.3 cm so I think. BD should be 42.3 cm too.

I used the sin rule again for ABD to find AD but by using B as 37° and b as AD.

I get AD = 25.45677548

For ADT,

AD is the hypotenuse.

Now I get from the same sin rule,

A= 90°. a= 25.45677548

B= 53°. b = AT

AT= 20.33068487 units.

Area of rectangle = l×b

= AB × AD

so that gives me 859.9879701 square units

7 0
3 years ago
Write the decimal in simplest fractional form: 2.25
aliya0001 [1]

Answer:

9/4

Step-by-step explanation:

0.25 is one fourth and if you convert the whole number into fourths and add the one fourth from the decimal it is 9/4

7 0
3 years ago
Read 2 more answers
Please help me thank you very much.<br><br> Please answer all 4 questions.
Mnenie [13.5K]
1. HI Because two parallel lines have to be on the same plane and never intersect.

2. Skew means the never intersect and they aren't on the same plane so it is GK and DH

3. Angle 3 corresponds because it is the bottom left and 7 is the bottom left.

4. 3 and 5 are same-side interior because they are both on the left side and both are inside.

Hope this helps!
6 0
3 years ago
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