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
Blababa [14]
3 years ago
10

In testing the effectiveness of an energy drink on the performance of athletes, 50 athletes were given water and 50 athletes

Mathematics
1 answer:
Aneli [31]3 years ago
3 0

The correct answer is C; Dependent variable.

Further explanation:

Researchers are very interested in the dependent variable. This variable is what is being tested and measured during the research in progress. In this case, it is the new energy drink.

The researchers are looking for an effect to occur while changing the independent variable of the case study. There are three main different types of variables used in research studies, they are;

  1. Independent
  2. Dependent
  3. Control

With the athletes doing exercises after consuming the test product, they are seeing if the product does give more energy than if they hadn't of consumed the energy drink.

Learn more about dependent variables at brainly.com/question/383055

#LearnwithBrainly

You might be interested in
Ms. Johnson owns a cabinet business that installs cabinets in kitchens. Her employees can install 2/3 of a kitchen cabinet set i
dmitriy555 [2]

Answer:

I don't know

Step-by-step explanation:

hi

8 0
3 years ago
A lacrosse player throws a ball into the air from a height of 6 feet with an initial vertical velocity of 64 feet per second. Wh
-Dominant- [34]

Answer:

Step-by-step explanation:

I'm going to use calculus to solve this, because it's the simplest way.  

The acceleration due to gravity in feet is the second derivative of the position function.  We will start with the acceleration and work backwards with antiderivatives to get to the position function.

a(t) = -32.  Going backwards and using the fact that the initial vertical velocity is 64 ft/sec, our velocity function is

v(t) = -32t + 64.  Going backwards and using the fact that the initial height of the ball is 6 feet, our position function is

s(t)=-16t^2+64t+6

The first part of this question asks us the maximum height of the ball.  From Physics, we learn that the maximum height of a projectile is reached when the velocity is 0, which happens to be right where the projectile stops for a nanosecond in the air to turn around and come back down.  We set the velocity function equal to 0 and solve for t.

0 = -32t + 64 and

0 = -32(t - 2).  By the Zero Product Property, either -32 = 0 or t - 2 = 0.  It's obvious that -32 does not equal 0, so t - 2 must equal 0.  Solving this for t:

t - 2 = 0 so

t = 2 seconds.  Since the maximum height is reached at a time of 2 seconds, we plug 2 seconds into the position function to get its position at 2 seconds (which is also the max height of the ball).

s(2)=-16(2)^2+64(2)+6 and

s(2) = -64 + 128 + 6 so

s(2) = 70 feet

Now we want to know when the ball will hit the ground.  "When" is a time value, and we know that the height of the ball on the ground is 0, so we sub in a 0 for s(t) and factor the quadratic.

Using the quadratic formula:

t=\frac{-64+/-\sqrt{4096-4(-16)(6)} }{-32} and

t=\frac{-64+/-\sqrt{4480} }{-32} which gives us the 2 solutions

t=\frac{-64+\sqrt{4480} }{-32} and

t=\frac{-64-\sqrt{4480} }{-32}

Plugging into your calculator, the first t = -.0916500 and the second t = 4.091

We all know that time cannot ever be negative, so our t value is 4.09.

Again, from Physics, we know that a projectile reaches it max height at halfway through its travels, so it just goes to follow logically that if it halfway through its travels at 2 seconds, then it will hit the ground at 4 seconds.  And it does!! How awesome is that?!

4 0
3 years ago
Solve the inequality − x 2 <4 -x2<4
vagabundo [1.1K]
1 and 2 I hope this help you :)
3 0
3 years ago
Noah says that 9X minus 2X plus 4X is equivalent to 3X because the subtraction sign tells us to subtract everything that comes a
lesantik [10]

Answer:

False

Step-by-step explanation:

It is given that Noah thinks :

9x - 2x + 4x = 3x   as the subtraction sign after 9x tells us to subtract everything that comes after 9x.

This is wrong as according to the BODMAS rule, we have to do the addition operation first and then followed by subtraction operation.

That is

⇒ 9x - 2x + 4x

⇒ (9x -2x)+ 4x

⇒ 7x + 4x

⇒ 11x

Therefore the answer to the equation is 11x and not 3x.

8 0
3 years ago
Can i pleaseee get help:(
AfilCa [17]

Answer:

Step-by-step explanation:

P=5/25=1/5=0.20

8 0
3 years ago
Read 2 more answers
Other questions:
  • 5.5 ÷ .25 and plz show work
    13·1 answer
  • Convert the following systems of equations to an augmented matrix and use Gauss-Jordan reduction to convert to an equilivalent m
    8·1 answer
  • What is the inequality
    11·1 answer
  • The Pythagorean Theorem is a relationship between the lengths of the sides of what kind of triangle?​
    15·2 answers
  • What value of x is in the solution set of 3(x-4) &gt; 5x +2<br><br>-10<br>-5<br>5<br>10<br>​
    5·1 answer
  • Rubber balls are packaged in a box with dimensions 8.5 cm, 5 cm, 5 cm.
    11·1 answer
  • 10 points and brainlest!!!!!
    11·2 answers
  • Find the slope (0,2) and (3,-3)
    8·1 answer
  • What would be the easiest way to solve the system composed of the following two equations? 3=x+4y and 2x=-9
    9·1 answer
  • A hose fills a 18-gallon tub in 3 minutes how long will it take to fill a 45 gallon tub
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!