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guajiro [1.7K]
3 years ago
8

Which option below best describes the difference between an experiment and an observational study?

Mathematics
1 answer:
noname [10]3 years ago
5 0

An observation study is where nothing changes and you record what is seen. An experimental study you have a control group and a testable group.

The answer would be: .C. The groups in an experiment are chosen at random, but not in an observational study.

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Which of the following properties can be used to show that the expression 4^{\frac{5}{3}} is equivalent to \sqrt[3]{4^{5}}
pantera1 [17]

Answer:

see below

Step-by-step explanation:

Not knowing what properties you have to choose from, it'll be one that looks like  a^{\frac{m}{n}}=\sqrt[n]{a^{m}};

The base (a) stays the same;

the Numerator in the exponent is the exponent on the base;

and the Denominator in the exponent is the index (root number) of the radical.

6 0
1 year ago
Please help!!!!! I will make you best answer!!!!
kondor19780726 [428]

Answer:

Option A

Step-by-step explanation:

Given function is,

f(x)=x^4-x^2-6

Hint: (-1=-3+2) and (-3)(2)=-6

f(x)=x^4-3x^2+2x^2-6

       =x^2(x^2-3)+2(x^2-3)

       =(x^2+2)(x^2-3)

f(x)=(x^2+2)(x^2-3) is the factored form of the given function.

Option A will be the correct option.

4 0
3 years ago
Help me please i dont understand
ELEN [110]

Answer:

6/5 or 1.2, they're the same value

Step-by-step explanation:

When it says "rate of change", it's really just asking for the slope. If you don't know what the slope is, essentially how much the y-value increases by whenever x increases by 1. This can be formally defined using the equation: \frac{y_2-y_1}{x_2-x_1} which is essentially \frac{rise}{run}. The subtraction is finding the difference between the two numbers to see how much it's changed by. Btw the order doesn't matter, I could plug in (-3, -2) as (x2, y2) or I could plug it in as (x1, y1) as long as I make sure to input it in correctly. In this example I'll just say (-3, -2) = (x1, y1) and (2, 4) = (x2, y2). Plugging these values into the equation gives you: \frac{4- (-2)}{2- (-3)} = \frac{6}{5} that's the rate of change

8 0
2 years ago
The weather forecast in a city is that for every week, 3 days are sunny 2 are cloudy, and 2 are rainy. On any chosen day, descri
Mnenie [13.5K]
It is more likely to be sunny than it is to be cloudy or rainy.
It is less likely to be cloudy or rainy than it is to be sunny.
it is equally likely to be cloudy or rainy.
7 0
3 years ago
1/7y+1/4=9/28 Solve Quick Please.
Monica [59]

Answer:

1/2.

Step-by-step explanation:

Multiply each term by 28 to remove the fractions>

4y + 7 = 9

4y = 2

y = 1/2.

6 0
3 years ago
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