1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
snow_tiger [21]
3 years ago
10

A scientist is studying the effects of cell phone use on headache rate. She identifies 30 people who use cell phones and 30 who

do not. Each of the 60 people is given a questionnaire designed to determine headache frequency. None of the 60 people who participated in the study knew they were part of a study. Which statement is true?
Mathematics
1 answer:
slava [35]3 years ago
7 0

Answer:

C this is a double blind study.

Step-by-step explanation:

Both groups in the experiment are blind (don't know they are in an experiment). If this answer is incorrect then its A.

You might be interested in
How do you find the value of n in a geometric progression?​
Bas_tet [7]

A geometric progression is also known as a geometric sequence.

Here is a video explaining how you find the n term value.

https://youtu.be/pwUdYEwT9kY

Hope this helps!

6 0
3 years ago
3. What is the average speed in miles per hour if it takes 25 minutes to travel 4 miles?
alekssr [168]

Answer:

9.6 miles per hour

Step-by-step explanation:

First find the unit rate.

25/4= 0.16 miles per minute

Then multiply by 60 ( which we know theres 60 minutes in a hour.)

0.16x60=9.6

6 0
4 years ago
Read 2 more answers
Find the value of the term in the arithmetic sequence. -4, 0, 4, 8, 12, . . . A. 22 B. 24 C. 26 D. 28
sesenic [268]

Answer:

Step-by-step explanation:

It does not look like any of these answers are correct (A, B, C, or D). The correct answer would be 16 because it is going up by 4 in this sequence

3 0
3 years ago
Need help! Please!! I been trying to correct my daughters work.! single dad picture attached number, questions number 8
laila [671]

Answer:

B: 210

C: 450

Step-by-step explanation:

You just need to multiply the two numbers overlapping in the box. For B, the two numbers for that box are 30 and 7, therefore you must multiply them together to get 210.  For C, the numbers are 90 and 5, when multiplied equals 450.  Hope that helps!

4 0
3 years ago
How do you solve this problem<br><br>35/8y+1491-2y
o-na [289]

Answer:

I suggest using the website called Cymath https://www.cymath.com/

it allows u to type in problems like this and shows you how to do it

Hope this helped!! Have a good day c;

Step-by-step explanation:


6 0
3 years ago
Read 2 more answers
Other questions:
  • I need an explanation and answer ty
    14·1 answer
  • Larry factored 9x2 + 24 as 9 (x2 - 2w + 24 what was the error
    10·1 answer
  • Round decimal numbers 8.72
    5·2 answers
  • Complete the solution for the equation. Find the value of y when x equals -14 -2x -3y=49
    5·2 answers
  • Cosy of a comic book: $3.95 markup: 20%
    14·1 answer
  • Helpppp Plsssss ASAP!! Thanks​
    8·1 answer
  • Every year, Mrs. Woods gives an end of the year math project as a major grade. The circle graph below
    9·1 answer
  • Does anyone know the answer to this!?!?
    9·2 answers
  • Solve the equation: <br> p-19/6= -15/6<br><br> The slash is the fraction bar jsyn :)) pls help
    11·2 answers
  • Please help me on this one
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!