The unit of density [kgm^-3] displays the formula.
So density=mass/volume.
Convert 2160g into kilograms [2160/1000=2.160kg]
Convert volume of 240cm^3 into m^3
100cm=1m
100x100x100=1000000cm^3=1m^3
240/1000000=[2.4x10^-4]
Final calculation
2.160/2.4x10^-4=9000
Answer: 9000kgm^-3
The transformation was a 180° rotation about the origin.
Because, if we take formulas of rotation about the origin:
X1=x*cos£+y*sin£.
Y1=-x*sin£+y*cis£.
And £=180°
Than we recieve
x1=-x
y1=-y
Answer:
a)
Reading score
discrete
b)
Student
c)
The reading scores of all students who could possibly be taught using this method.
Step-by-step explanation:
a)
As the educational researcher is measuring the reading score to assess the effect of teaching method so, the variable to be measured is reading score.
The reading score is a quantitative variable because it can be represented meaningfully in a numerical form. Also, the reading scores are countable, so reading score is a discrete variable.
b)
The reading score of students are measured to asses the effectiveness of new teaching method so, the experimental units are students.
c)
The population of interest would be the reading scores for all students as the reading scores of students is measured by researcher. Thus, the population of interest is the reading scores of all students who could possibly be taught using this method.
Answer:
20x + 10
Step-by-step explanation:
Given that :
Number of $20 bill = x
Number of $10 bill = 1
Total amount of money can be expressed as :
Σ(Value of bill * number of bill)
Hence,
($20 * x) + ($10 * 1)
20x + 10
The expression for the amount of money Donald has is : 20x + 10
