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Irina18 [472]
3 years ago
14

A professor wants draw a sample of 50 students to fill out a questionnaire about which sports they play. The professor’s 10:00 a

m class has 50 students. She uses the first 20 minutes of class to have the students fill out the questionnaire. Which sampling method did the professor use?
Mathematics
1 answer:
Vikentia [17]3 years ago
8 0

Step-by-step explanation:

I would suggest that this is cluster sampling.

The teacher is selecting a cluster of the population at random to sample.

This is a method of probabalistic sampling.

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. One-fifth of the plants in a garden are grape tomato plants. Two-ninths of the plants in the garden are cherry tomato plants.
vodomira [7]

Answer:52

Step-by-step explanation:

Given

one-fifth of the plants in a garden are grape tomato plant

two-ninth of the plants in the garden are cherry tomato plants

Also there are 18 grape tomato and 20 cherry tomato plants.

Let Total plants be x

Then Grape tomato plants =\frac{x}{5}=18

x=90

thus there are total of 90 plants

also grape tomato+cherry tomato=18+20=38

Thus there are 90-38=52 remaining plants.

6 0
3 years ago
Find a three digit number. The tens digit is 3 time the hundreds digit. The sum of the digits is 15. If you reverse the digits,
tresset_1 [31]

Answer:

number = 267

Step-by-step explanation:

i am a 3 digit number divisible by 3.

100a + 10b + c

my tens digit is 3 times as great as my hundreds digit

b = 3a, from this we know a = 1, 2, 3, then b = 3, 6, 9

and the sum of my digits is 15.

a + b + c = 15

if you reverse my digits i am divisible by 6 and 3

100c + 10b + a

this is a logic problem, an equation won't help us here

From the given information b = 3a, and the sum of the 3 digits = 15, we have:

1 3 ___; three single digits can't add up to 15

2 6 _7_; this has to be the number

3 9 _3_; reverse number is not different

Check for division by 3 and 6

267/3 = 89

762/6 = 127

267 is the number

3 0
3 years ago
Leonard made the 3-d shape below for an art project. He wants to paint it blue.
GalinKa [24]

Answer:

Is 10cm and 6 cm an option

4 0
2 years ago
Due: Thursday at 11:00 PM
jasenka [17]

Answer: 1/25

Step-by-step explanation:

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3 years ago
Find the missing length in the image below
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Answer:

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