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White raven [17]
2 years ago
15

Rodrigo sits at a street corner and records the number of red sports cars that are and are not speeding. What kind of study is t

his?
Mathematics
2 answers:
Brut [27]2 years ago
6 0

Answer: Observational study.


Step-by-step explanation:

Given: Rodrigo sits at a street corner and records the number of red sports cars that are and are not speeding.

Here Rodrigo is not influencing the cars, just observing the cars and measure variables that which car is speeding and which are not. Therefore, the study done by him is observational study.

Observational study is the study where the researcher observes the subjects and measures variables, but does not influence the population .There is no manipulation by the researcher.


Anna71 [15]2 years ago
4 0
Observational study-apex
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6. A sporting goods store receives an order of 100 baseball caps, of which 22 are green. If 1 of
Taya2010 [7]

Answer:

\text{A. }39/50

Step-by-step explanation:

The probability that a randomly selected cap will not be green is equal to the number of non-green caps divided by the total number of caps.

Since there are 100 caps total and 22 are green, there must be 100-22=78 non-green caps.

Divide this by the total number of caps (100) to get the probability that a randomly selected cap will not be green:

\frac{78}{100}

Simplify by dividing both the numerator and denominator by 2:

\frac{78}{100}=\boxed{39/50}

6 0
3 years ago
Pleaseee someone help me :( Ive been stuck on this for an hour
Whitepunk [10]

Answer:

The number of times organism B's population is larger than organism A's population after 8 days is 32 times

Step-by-step explanation:

The population of organism A doubles every day, geometrically as follows

a, a·r, a·r²

Where;

r = 2

The population after 5 days, is therefore;

Pₐ₅ = = 32·a

The virus cuts the population in half for three days as follows;

The first of ta·2⁵ he three days = 32/2 = 16·a

The second of the three days = 16/2 = 8·a

After the third day, Pₐ = 8/2 = 8·a

The population growth of organism B is the same as the initial growth of organism A, therefore, the population, P₈ of organism B after 8 days is given as follows;

P₈ =  a·2⁸ = 256·a

Therefore, the number of times organism B's population is larger than organism A's population after 8 days is P₈/Pₐ = 256·a/8·a = 32 times

Which gives, the number of times organism B's population is larger than organism A's population after 8 days is 32 times.

Hope this helps you out! :)

Also, it's OK! This was actually pretty hard to figure out!

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3 years ago
Travel A train makes a trip at 65 mi/h. A plane
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Answer:

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Step-by-step explanation:

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8 0
2 years ago
If $1000 is divided equally amung 12 people about how much will each person reserve?
Dmitry_Shevchenko [17]
$1,000/12 = 83.3 repeated
Each person will reserve about $83.
3 0
3 years ago
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How many ways can Hannah give three of her eight T-shirts to her younger sister?
prisoha [69]
If Hannah gives her younger sister 3 shirts, it does not matter what order she hands them to her. No matter the order, it will still be the same group of 3 shirt. Since order is not important this problem can be solved using a combination.

Specifically we are asked to find 8C3 (sometimes called "8 choose 3"). This is a fraction. In the numerator we start with 8 and count down 3 numbers. In the denominator we start with 3 and count all the way down to 1. Thus we obtain,

\frac{(8)(7)(6)}{(3)(2)(1)}=(8)(7)=56
7 0
3 years ago
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