Answer:
B
Step-by-step explanation:
Minimum L = 45
Maximum L = 180
L(w) = 3w - 27
Therefore, when 45 = 3w - 27 ⇒ w = 24
when 180 = 3w - 27 ⇒ w = 69
So 24 ≤ w ≤ 69
Therefore, the answer is B
Answer:
0.3
Step-by-step explanation:
Probability always adds up to 1 or 100%
in this case 0.2 + 0.5 = 0.7
1.0 - 0.7 = 0.3
hope this helps! :)
Answer:
E
Step-by-step explanation:
Solution:-
- We are to investigate the confidence interval of 95% for the population mean of walking times from Fretwell Building to the college of education building.
- The survey team took a sample of size n = 24 students and obtained the following results:
Sample mean ( x^ ) = 12.3 mins
Sample standard deviation ( s ) = 3.2 mins
- The sample taken was random and independent. We can assume normality of the sample.
- First we compute the critical value for the statistics.
- The z-distribution is a function of two inputs as follows:
- Significance Level ( α / 2 ) = ( 1 - CI ) / 2 = 0.05/2 = 0.025
Compute: z-critical = z_0.025 = +/- 1.96
- The confidence interval for the population mean ( u ) of walking times is given below:
[ x^ - z-critical*s / √n , x^ + z-critical*s / √n ]
Answer: [ 12.3 - 1.96*3.2 / √24 , 12.3 + 1.96*3.2 / √24 ]
Answer:
In addition, from the response shown, using a graphical calculator brings the following benefits:
1) You can write the system of linear equations as big as you want. This is: systems 3 * 3, 4 * 4, 5 * 5.
2) The response to systems of equations greater than 2 * 2 can be complicated when you graph the solution, therefore, the graphing calculator can be much more efficient in these cases.
3) You can write the linear equations in any way. Resolving by hand you should probably rewrite the system of equations to find the solution.
Step-by-step explanation:
Answer: 2
Step-by-step explanation: In order to find out the radius you first need to find out the diameter. Diameter times pie or 3.14 equals the area. So, if the area is 12.4 you need to divide 12.4 by 3.14 which gives you 3.94 which rounds up to 4. The radius is half of the diameter so divide 4 by 2 to get 2