Answer: Option 'd' is correct.
Step-by-step explanation:
Since we have given that
Margin of error = 0.5 years
Standard deviation = 5
At 90% confidence, z = 1.645
We need to find the minimum size of the sample they must take.
So,

Hence, Option 'd' is correct.
Answer:
x = 8
Step-by-step explanation:
The sum of the exterior angles of a polygon = 360°
Sum the exterior angles and equate to 360
62 + 66 + 77 + 59 + 12x = 360, that is
264 + 12x = 360 ( subtract 264 from both sides )
12x = 96 ( divide both sides by 12 )
x = 8
<span>The answers are:
3x + 33y = –420
</span><span> x + 140 = –11y</span>
Answer:
-8
Step-by-step explanation: