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3 years ago

A study of sleep patterns randomly selected participants in the study to sleep in either a dark room or a room with light.

Mathematics

2 answers:

garri49 [273]3 years ago

8 0

Answer:

C. randomization

Step-by-step explanation:

We are told that the study randomly selects participants in the study to sleep in either a dark room or a room with light. This means that randomization is part of the study.

ladessa [460]3 years ago

3 0

The answer is c: randomization

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Consider the function f(x) = x2 + 2x – 15. What are the x-intercepts of the function? Left-most x-intercept: ( , 0) Right-most x

Irina-Kira [14]

Answer:

(- 5, 0) and (3, 0)

Step-by-step explanation:

Given

f(x) = x² + 2x - 15

To find the x- intercepts let f(x) = 0, that is

x² + 2x - 15 = 0 ← in standard form

(x + 5)(x - 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5 ← left x- intercept

x - 3 = 0 ⇒ x = 3 ← right x- intercept

9 0

3 years ago

Read 2 more answers

Is the answer b?????

Lostsunrise [7]

Answer:

it should be A if not im sorry

Step-by-step explanation:

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2 years ago

Emma makes a poster for the schools spring concert she divides the poster into 8 equal parts she uses two if the parts for the t

V125BC [204]

2/8 or 1/4. 1/4 is just simplified. I hope it helps!

7 0

4 years ago

Item 18

nlexa [21]

Approximately 14%

14-12=2
2/14=1/7
1/7*100=14.29
14.29%

3 0

3 years ago

each morning, danai buys breakfast on her why to work. In the past thirty days, she bought a bagel on 6 days, a banana on 12 day

Ksju [112]

Answer:

0.7 or 70%

Step-by-step explanation:

Total number of days

6 + 12 + 3 + 9 = 30

The number of days she bought a banana or orange

12 + 9 = 21

The probability of buying a banana or an orange is

P(b or o) = 21/30 = 0.7 = 70%

8 0

2 years ago