The scale from the drawing means ...
... drawing size : life size = 3 : 1000
This can be turned around to get ...
... life size : drawing size = 1000 : 3
I find this form more convenient to use in a proportion:
... actual length / drawing length = 1000 / 3
Multiplying by "drawing length", we get ...
... actual length = (drawing length)·(1000/3)
This will be true for both drawing lengths.
_____
... Pool length = (15 cm)·1000/3 = 5000 cm = 50 m
... Pool width = (7.5 cm)·(1000/3) = 2500 cm = 25 m
The area is the product of these dimensions:
... pool area = (50 m)·(25 m) = 1250 m²
No x = -10 cannot be an input value because the x is the number of students , which can only be from 0 and above. You cannot have negative students.
Answer:
Margin of error = 4.21 ounces
Step-by-step explanation:
According to the Question,
- Given That, You measure 25 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 12.8 ounces
Therefore, Sample mean = 31 ounces , Sample size(n) = 25 , Alpha(α) = 0.10 & Population standard deviation(σ) = 12.8 ounces
- Thus, Margin of error =
× σ / √n ( at α=.010 is 1.645)
Putting The Values, We get
1.645 × (12.8 / √25 ) ⇒ 4.2112 ≈ 4.21
Thus, the maximum margin of error associated with a 90% confidence interval for the true population mean turtle weight is 4.21 ounces
Answer:
He must pay $129.45 and the total amount due is $3,629.45.
Step-by-step explanation:
I (interest) =P (principal) x R (rate) x T (time)
I=3500x.09x150/365
I=129.45
A (amount due) = P (principal) + I (interest)
A= 3500 + 129.45
A= $3629.45
