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
hodyreva [135]
3 years ago
7

Pls i need help 21÷3+(3×9)×9+5​

Mathematics
1 answer:
Vlada [557]3 years ago
5 0

Answer:

that will be 225 ... I think

You might be interested in
The effect of exposure to high-density automobile traffic either as a bicyclist or pedestrian was compared to minimal or no expo
Ber [7]

The option B is correct option. Thus, the Study design is used is a Case control study.

According to the statement

we have given that the incident cases of MI diagnosed in the emergency rooms of several hospitals is 500 and compared to 1,000 other subjects who visited the same emergency rooms for reasons other than cardiovascular and respiratory diseases.

And we have  to find that the all these type of reports are formed which study method in medical science.

So, For this purpose, we know that the

A case control study is a  study that compares two groups of people: those with the disease or condition under study (cases) and a very similar group of people who do not have the disease or condition (controls).

This study is perfectly match with the given condition.

So,

Case-control study is used in it by the below written way:

The study design relies on hospital-based recruitment of cases (persons with an MI) and controls (other patients in the emergency room who did not have cardiovascular and respiratory diseases which may be associated with air pollution). The exposure under investigation is a time-dependent measure of exposure to high-density automobile traffic in the days preceding the emergency room visit.

So, The option B is a correct option. The Study design is used is a Case control study.

Learn more about Case control study here

brainly.com/question/24087096

Disclaimer: This question was incomplete. Please find the full content below.

Question:

The effect of exposure to high-density automobile traffic either as a bicyclist or pedestrian was compared to minimal or no exposure to automobile traffic. It is hypothesized that direct exposure to automobile traffic has an effect on acute myocardial infarction (MI). This association was studied with 500 incident cases of MI diagnosed in the emergency rooms of several hospitals and compared to 1,000 other subjects who visited the same emergency rooms for reasons other than cardiovascular and respiratory diseases. All subjects were asked to report the amount of time that they spent exposed to high-density traffic over the past month prior to their hospital visit.

What type of study design is this?

A) Cross-sectional

B) Case-control

C) Retrospective cohort

D) Prospective cohort

E) Randomized clinical trial

#SPJ4

5 0
2 years ago
Weight of an object on particular scale is 145.2lbs. Measurement may vary the actual weight by at most 0.3 lbs. what's the actua
kotegsom [21]
Thank you for posting your question here at brainly. The actual range weights of the object is I think 144.9 to 145.5. I hope the answer will help. 
5 0
3 years ago
Read 2 more answers
Is 593 divide by 6 a little less than 10, a little more than 10, a little less than 100, or a little more than 100? Explain.
lesantik [10]
A little less than 100. 593 is 7 numbers away from 600, so if you divide 6 by 600 hundred the answer is 100. Since 593 is less than 600, the answer will be less than 100.
6 0
4 years ago
Read 2 more answers
Gary mails 1000 flyers to clients in one week how many flyers does Gary mail
Natalija [7]

He mails

         (1000) x (the number of weeks he keeps it up)

of them.

5 0
3 years ago
After the temperature described in problem 17 scientist found at the temperature of the compound with 90° what was the compounds
boyakko [2]

Answer:im sorry i just did so much reserch but it was wrong

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Helppp!!!! please!!!
    15·2 answers
  • One step equations x/4 =9
    12·2 answers
  • Janet bought a pair of sandals for $120.00. She needs to pay the 7% sales tax. How much will Janet pay in sales tax?
    7·2 answers
  • What do you add to 3 4/7 to make 6??
    13·1 answer
  • PLZ HELP ME I NEED HELP PLZ HELP 20 POINTS
    14·2 answers
  • Select the BEST classification for square root .0081 . A) irrational B) rational C) imaginary D) complex
    13·2 answers
  • What is the solution to the system of equations? HELP
    13·2 answers
  • Need help with this
    14·1 answer
  • Approximately 10% of all people are left-handed. Consider a grouping of fifteen people.
    7·1 answer
  • There are 9 flash cards with numbers from 20 to 28 written on them. Laura drew the card with 22 on it. She is about to draw anot
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!