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
Svetlanka [38]
2 years ago
10

Which situation is an example of an observational study?

Mathematics
2 answers:
user100 [1]2 years ago
6 0

Answer:

s

Step-by-step explanation:

CaHeK987 [17]2 years ago
4 0

Answer:

D- Recording the reaction time of participants in a study who were asked to press a button as soon as they see a certain picture on a screen.

Step-by-step explanation:

You might be interested in
1. The temperature at 2:00 a.m. was −12°. At noon, the temperature had risen 16°. At 4:00 p.m., the temperature had dropped 8°.
tatuchka [14]

The temperature at 4:00 p.m. is -4 degrees

5 0
3 years ago
PLEASE HELP!!!!!!!!!!
trasher [3.6K]

Ebony kept her bank account open for only 3 weeks, and the graph shows the entire 3 weeks. During that time,her greatest balance was $400

8 0
3 years ago
One angle of a triangle measures 65°. The other two angles are in a ratio of 3:20. What are the measures of those two angles?
Nataly_w [17]

Answer:

15° and 100°

Step-by-step explanation:

65 + 3x + 20x = 180

23x = 115

x = 5

3 × 5 = 15, 20 × 5 = 100. So the other two angles measure 15° and 100°.

3 0
2 years ago
A human hair is approximately 40 microns (um) wide. If 1 um is equal to 10
Natasha2012 [34]

Answer:

D 40,000nm

Step-by-step explanation: 1nm/10^-9m * 10^-6/1um = 10^3 nm/um

Therefore in 40 microns there are:

40um * 10^3 nm/um = 40 * 10^3 nm = 40,000 nm

5 0
2 years ago
If f(x)=-x+8 and g(x)=x^4,what is (g•f)(2)?
wariber [46]
Answer:

It can be written as <span>f<span>(−8)</span></span> or <span>f<span>(3<span>(−2)</span>−2)</span></span>

Explanation:

You would substitute <span>−2</span> for the x in <span>3x−2</span> and then insert <span>3<span>(−2)</span>−2</span> for the g. You would end up with <span>f<span>(3<span>(−2)</span>−2)</span></span>, which can also be simplified to <span>f<span>(−8<span>)</span></span></span>

5 0
3 years ago
Other questions:
  • Which table represents the graph below?
    12·2 answers
  • A building is 30 meters tall and 50 meters on each side of its square base. What is the perimeter of the base of the building?
    6·1 answer
  • What is the simplified radical of 145?
    13·2 answers
  • Find 0.1 more than 5.023.<br> a.5.024<br> b.5.033<br> c.5.123<br> d.5.134
    9·2 answers
  • Help me please . What is the answer
    12·1 answer
  • Question 7 (1 point)
    14·1 answer
  • During the first race, 13 people ran a 1.5 mile race. During the second race, 5 people ran a 2.2 mile race. How many more total
    13·1 answer
  • I need an answer as soon as possible
    5·1 answer
  • Colin bought a postcard for 45 cents . he gave the cashier $1 how much change did he receive
    5·1 answer
  • Which statement is correct regarding the measurements of the parallelogram?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!