Answer:
$12644.56
Step-by-step explanation:
one year = 12 month
4,000 * (1.02)^(6*12) = 16644.5615
16644.5615-4000 = 12644.5615
Answer: 68
Step-by-step explanation:
As per given , we have
Population standard deviation : 
Critical value for 90% confidence interval =
Margin of error : E= 0.8 milligrams
The formula to find the sample size is given by :-

i.e. 

Hence, the limnologist must analyze 68 samples.
All you have to do is divided 43.54 divided by 3.5 which is 12.44 mph
Answer:
Part 1) 
Part 2) 
Step-by-step explanation:
step 1
Find the value of x
In the right triangle of the figure
---> opposite side angle of 30 degrees divided by the hypotenuse
Remember that

substitute
solve for x


step 2
Find the value of y
In the right triangle of the figure
---> adjacent side angle of 30 degrees divided by the hypotenuse
we have


substitute

