Answer:
Step-by-step explanation:
-1
Answer:
A student finds a 95% confidence interval of (16.34,18.69) for the mean number of species counted. This is a valid interval because the mean number of species or any population mean does not necessarily have to be a whole number, as stated by the student.
This given confidence interval of (16.34,18.69) helps us to simply estimate the mean species counted.
Jeb took 1/4 of 100 minutes(1 hour 40 minutes) =25 minutes for the first lap. . so the rest 75 minutes , Jeb took 1/3 time so 25 minutes for the second lap , the third lap Jeb took 100-50 = 50 minutes .
x = 56°
Solution:
Part A:
Given data:
2x and 68° are adjacent angles in a straight line and their measures have sum of 180°.
Part B:
<em>Sum of the adjacent angles in the straight line is 180°.</em>
2x + 68° = 180°
Subtract 68° from 180°, we get
⇒ 2x = 112°
Divide by 2 on both sides, we get
⇒ x = 56°
The value of x is 56°.
Part C:
By part A and part B,
2x° + 68° = 2(56°) + 68°
= 112° + 68°
= 180°
2x° + 68° = 180°
Hence proved.
Answer:
Step-by-step explanation:
Anwers are in the following attachments.
