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3 years ago

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;

Independent
Dependent
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

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sattari [20]

<h3>Explanation:</h3>

Replace cos^2(θ) with 1-sin^2(θ), and cot(θ) with cos(θ)/sin(θ).

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(1 -sin^2(θ))cot^2(θ) = . . . . . replace cos^2 with 1-sin^2

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3 years ago

I need to know the area

nadya68 [22]

Answer:

67.5 units²

Step-by-step explanation:

We can break this problem down in two parts: The upper triangle and the lower trapezoid.

The upper triangle:

Use the formula $\frac{1}{2} (b)(h)$ to compute the area of the triangle. Base = 10 and Height = 7.

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The lower trapezoid:

Use the formula $\frac{1}{2}(base_{1} + base_{2}) (height)$ to compute the area of the trapezoid. Base 1 = 10, Base 2 = 3 and Height = 5.

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1/2 (65)

=32.5 units²

So, add the two areas of each shape:

35 + 32.5 = 67.5 units².

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Answer:

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Step-by-step explanation:

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