Answer:
Random sample
Step-by-step explanation:
It's a random sample because she did not pick the students 1 by 1, she just chose random students from a list
Answer:
140
Step-by-step explanation:
20.82 = 21 when rounded to the nearest whole number
6.94 = 7
21*7 = 147
The best estimate is 140
Answer:
x = 8 sqrt(2)
Step-by-step explanation:
Since this is a right triangle
sin 45 = opp side/ hypotenuse
sin 45 = 8/x
Multiply each side by x
x sin 45 = 8/x *x
x sin 45 = 8
Divide each side by sin 45
x sin 45 /sin 45 = 8 /sin 45
x = 8 / sin 45
We know sin 45 = 1/ sqrt (2)
x = 8 / 1 / sqrt(2)
x = 8 sqrt(2)
Answer: the fifth one is true
Step-by-step explanation: I have had this question before
