Author Question: The rare-Earth hypothesis would predict that the factor flife, in the Drake equation should be close ... (Read 66 times)

ishan

  • Hero Member
  • *****
  • Posts: 546
The rare-Earth hypothesis would predict that the factor flife, in the Drake equation should be close to
 
  A) 0
  B) 0.25
  C) 1
  D) 0.5

Question 2

If vector = -3.0 - 4.0 , and vector = +3.0 -8.0 , then the magnitude of vector = - is
 
  A) 3.0
  B) 16
  C) 7.2
  D) 144
  E) 13.4



parker125

  • Sr. Member
  • ****
  • Posts: 332
Answer to Question 1

A

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

For a complete list of videos, visit our video library