P = 2*pi*sqrt(a^2 +b^2/2 =
2 *3.14 * sqrt(15/2^2 +7.5/2^2/2 =
6.28 x sqrt(56.25+14.0625/2
6.28 *sqrt(35.15625)
6.28 * 5.929270613= 37.235
answer is B 37.3 feet
Answer:
(a) The solutions are:
(b) The solutions are:
(c) The solutions are:
(d) The solutions are:
(e) The solutions are:
(f) The solutions are:
(g) The solutions are:
(h) The solutions are:
Step-by-step explanation:
To find the solutions of these quadratic equations you must:
(a) For
The solutions are:
(b) For
The solutions are:
(c) For
The solutions are:
(d) For
For a quadratic equation of the form the solutions are:
The solutions are:
(e) For
The solutions are:
(f) For
The solutions are:
(g) For
Using the Zero Factor Theorem: = 0 if and only if = 0 or = 0
The solutions are:
(h) For
Using the Zero Factor Theorem: = 0 if and only if = 0 or = 0
The solutions are:
Answer: 482
Step-by-step explanation:
Formula to find the sample size is given by :-
(1)
, where z* = critical z-value (two tailed).
= Population standard deviation and E = Margin of error.
As per given , we have
Margin of error : E= 3
Confidence level = 90%
Significance level =
Using z-table , the critical value for 90% confidence=
Required minimum sample size = [Substitute the values in formula (1)]
[ Round to the next integer]
Hence, the number of observations required is closest to 482.