Answer:
B
Step-by-step explanation:
180-150=30
angle 3 is a right angle so it equals 90
all triangles add up to 180
so 90 + 30 is 120
180-120=60
a line is 180 degrees
so the answer is 120 B
Answer:
C) Sample: the 120 students surveyed. Population: the 1200 students at the high school. Parameter of interest: the average number of hours a student at this high school sleeps per night.
Step-by-step explanation:
- Population is the total units of study for the research.
- Sample is the selected units, chosen for conducting the research study.
- Parameter of interest is the characteristic or variable, that is studied related to the population or sample
Research of average hours of sleep in a school; on the basis of 120 students selected for the study; are :-
- Population is the total number of students in the school, i.e = 1200 students
- Sample is the selected number of students, chosen (enquired) for the study, i.e = 120 students
- The parameter of interest is the variable of students, that needs to be studied, i.e average sleep hours.
Answer:
about 9cm
Step-by-step explanation:
Muliply the radius by itself: 16x16
Mulitply the answer by 3.14.
Divide 7252 by the answer to get 9
Answer: It a permutation
Step-by-step explanation: Hope this help :D
