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raketka [301]
3 years ago
13

The 1990s and early 2000s could be considered the steroids era in a certain professional baseball​ league, as many players have

admitted to using the drug to increase performance on the field. If a sports writer wanted to compare home run totals from the steroids era to an earlier​ decade, say the​ 1960s, explain why this would be an observational study. Could the writer conclude that it was the steroids that caused the increase in home​ runs? Why or why​ not?
Mathematics
1 answer:
serg [7]3 years ago
4 0

Answer:

Step-by-step explanation:

This could be an observational study because an experiment was not carried out by the research to further verify this hypothesis. Individuals are observed and data is collected from such observation. No effort is made by the researcher to affect the outcome of such results.

This study alone is not enough to conclude about a cause and effect relationship between steroids and the increase in home​ runs as thus study is not randomized and cant control other factors or links bringing about this result.

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Three museums charge an entrance fee based on the number of visitors in the group. the table lists the fees charged by the museu
Ganezh [65]

The entrance fee is proportional to the number of visitors at A)museum a.

In arithmetic, two sequences of numbers, often experimental statistics, are proportional or at once proportional if their corresponding factors have a regular ratio, that's called the coefficient of proportionality or proportionality consistent.

The definition of proportional is something that has an incredibly correct dating of length or that is appropriate. An example of something proportional is a woman's tiny toes to her quick stature. An instance of something proportional is the quantity of pay a worker receives for the hours that they installed.

While something is proportional to something else, it does no longer suggest the values are equal, simply that they trade with admiration for each other. The regular of proportionality serves as a multiplier.

Learn more about proportionality here: brainly.com/question/1496357

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7 0
2 years ago
The distance d (in feet) a penny falls from the window of a building is represented by d = 16t^2 where t is the time (in seconds
steposvetlana [31]

Answer:

5 seconds

Step-by-step explanation:

d = 16t^2

You are given the distance, d, and you need to find the time, t. Replace d with the given distance, 400 ft.

d = 400

400 = 16t^2

Switch sides.

16t^2 = 400

Divide both sides by 16.

t^2 = 25

Take the square root of both sides.

t = 5

Answer: 5 seconds

4 0
4 years ago
What is the area of the following circle ​
slega [8]

Answer:

3.14 units²

Step-by-step explanation:

Area=πr²

Where π=3.14, r=1 unit

=(3.14)(1)²

=(3.14)(1)

=3.14 units²

5 0
3 years ago
The graph below shows a company's profit f(x), in dollars, depending on the price of pencils x, in dollars, sold by the company.
lutik1710 [3]

Answer:

Step-by-step explanation:

Part A

The x-intercept are the values of the variable "x" for which the value of the function, f(x) is zero (f(x) = 0)

The given parameters are;

The values of the function, f(x) = The company's profit

The values of the independent variable, "x" = The price of erasers

Therefore, at the x-intercept, where the values of the variable "x" are 0 and 8, the profit of the company, (f(x)) is 0 (the company does not make any profit)

2) The maximum value, which is the highest point of the graph with coordinate (4, 270), gives the company's maximum profit, f(x) = $270, and the price of the eraser, x-value, at which the company makes maximum profit which is at the price of an eraser, x = $4

3) The intervals where the function is increasing is 0 ≤ x ≤ 4

At the interval where the function is increasing, the sale price is increasing and the profits are increasing

The intervals where the function is decreasing is 4 ≤ x ≤ 8

At the interval where the function is decreasing, the sale price is increasing and the profits are decreasing

Part B

The appropriate average rate of change of the graph from x = 1 to x = 4 where f(x) = 120 and 270 respectively is given as follows

Rate of change of the graph from x = 1 to x = 4 is (270 -120)/(4 - 1) = 50

The average rate of change of the graph represents that the as the price of the eraser increases by $1.00 the profits increases by $50.00

THIS WAS NOT MY OWN ANSWER, PLEASE LET oeerivona TAKE THE POINTS!!

7 0
3 years ago
The sentence on the bottom not on the top.<br><br> GIVE U 100 POINTS PROMISE
oksian1 [2.3K]
John dana and douglas painted a room
they have combined effort so
john+dana+douglas=total room

total room=100%=1/1=1
so 1 whole=8/8 so
2/8 is painted by john so they don't need to paint that so
so
2/8+dana+douglas=8/8
subtract 2/8 frm both sides
dana+dogluas=(8-2)/8=6/8
dana+douglas=6/8
dana painted same as douglas so divide by 2
dana=douglas=3/8


so A is 6/8 or 3/4
B is 2/8+3/8+3/8=8/8 or 2/8+dana+douglas=8/8

7 0
3 years ago
Read 2 more answers
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