Cut 5/12 of his lenght

remain 7/12 of his lenght

7/12*L - 6/7 *7/12*L=2 1/2 m
7/12*L(1-6/7)=7/12*L(7/7-6/7)=7/12*L*1/7=L/12 =2 1/2

⇒L=2 1/2 m *12=5/2*12=30 m

Original length was 30 m

5 0

3 years ago

The U.S. Bureau of Labor Statistics reports that 11.3% of U.S. workers belong to unions. Suppose a sample of 400 U.S. workers is

lorasvet [3.4K]

Answer:

1 is the answer

Step-by-step explanation:

Given that the U.S. Bureau of Labor Statistics reports that 11.3% of U.S. workers belong to unions.

$H_0: p=0.113\\H_a: p >0.113$

(Right tailed test for testing of a sample proportion with population proportion)

Suppose a sample of 400 U.S. workers is collected in 2014 to determine whether union efforts to organize have increased union membership at 0.025 level of significance.

Test statistic Z = 1.31

p value for this right tailed test would be 0.095

This p value is greater than 0.025

Hence at 2.5% significance level the conclusion is correct

1 is the answer.

6 0

4 years ago

A rectangular prism has dimensions of 3ft, 2ft and a volume of 30ft cubed. What is its other dimension?

finlep [7]

Should be 6ft (jsidbkahrbrk)

8 0

3 years ago