Hello
<span>D. 2 imaginary roots (complex conjugates)</span>
Answer: Melanie swam 63 minutes more in second week.
Step-by-step explanation:
Given , Time taken by Melanie in first week to swim = 142 minutes
Combined time taken by her in first two weeks in swimming = 347 minutes
Now , time taken by her in second week = (Combined time of first two week) - (Time taken in first week)
= 347-142 minutes
= 205 minutes
Clearly , 205 > 142 i.e. She swam more in second week than first week./
Difference i= 205-142 = 63
Therefore, Melanie swam 63 minutes more in second week.
Answer:
a) 217
b) 1351
c) 5403
Step-by-step explanation:
Given that:
confidence interval (c) = 0.95

The Z score of
is from the z table is given as:

Range = $45000 - $30000 = $15000
The standard deviation (σ) is given as:

Sample size (n) is given as:

a) E = $500
≈ 217
b)
≈ 1351
c)
≈ 5403
Answer:
B hope this helps :)
Step-by-step explanation:
Answer:

Step-by-step explanation:

hope this helps
brainliest appreciated
good luck! have a nice day!