B. This is an observational study because a treatment was applied to both groups.
C. This is an experiment because a treatment was applied to a group.
D. This is an experiment because students were able to choose which group to join.
#3. ......Angie, a student in an advanced statistics course, was given an algebra test and she scored 80%. Is this an accurate predictor of how well students in the algebra class will perform on the test?
A. Yes, because Angie is representative of the population in the algebra class
B. Yes, because Angie scored high on the test so it must be easy
C. No, because Angie is not representative of the population in the algebra class
D. No, because Angie scored too high on the test
Answer:
27
Step-by-step explanation:
3/5of 45 is basically what you are looking for and it in itself is the equation you have to solve
3/5 is 3 divided by and "of" is basically multiply by 45
3/5*45
.6*45
27
Which of the following is the first correct step to write the above equation in the form (x − p)2 = q, where p and q are integers? (5 points)
A:Add 8 to both sides of the equation
B:Add 9 to both sides of the equation
C:Subtract 8 from both sides of the equation
D:Subtract 9 from both sides of the equation
The first correct step to write the above equation in the form id to subtract 49 from both sides of the equation
The standard vertex form of an equation is expressed as:
a(x − p)² = q
Given the quadratic equation x^2 − 14x + 49 = 0
The first step is to subtract the constant of the expression from both sides as shown:
Subtract 49 from both sides of the equation to have:
x^2 − 14x + 49 = 0
x^2 − 14x + 49 - 49= 0 - 49
x^2 - 14x = -49
Hence the first correct step to write the above equation in the form id to subtract 49 from both sides of the equation
Learn more on vertex form here: brainly.com/question/17987697
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On the highway, Kareem's car gets 38 mpg.
Shu Fang has $25.75 deducted from her checking account every month.
A toad population is increasing by about 7.5% each year.
An event organizer finds each year's attendance for the past five years is about 4/5 of the previous year's attendance.
Answer: A toad population is increasing by about 7.5% each year.
An event organizer finds each year's attendance for the past five years is about 4/5 of the previous year's attendance.
Step-by-step explanation:
On the highway, Kareem's car gets 38 mpg.
This can be modeled with a linear relationship between the miles and the gallons of fuel needed.
Shu Fang has $25.75 deducted from her checking account every month.
Here we know that each month a constant amount is deducted from her, this is not an exponential relation.
A toad population is increasing by about 7.5% each year.
If the population initially was an amount P, after one year the population is P*1.075, after two years the population is P*(1.075)^2 and so on, this can be modeled with an exponential function where the years variable, the function will have the general form:
Population(y) = P*(1.075)^y
An event organizer finds each year's attendance for the past five years is about 4/5 of the previous year's attendance.
If the first year the population is X, the year after the attendance will be (4/5)X, and the year after this process applies again, so you have a 4/5 of the previous attendance, the attendance now is (4/5)^2*X
This also can be modeled with an exponential function, of the shape:
Attendance (y) = X*(4/5)^y, where again, y means years.
The thing you may notice is that in this case the model only works for the lapse of 5 years that the event organizer said.