)there are 20 men and 15 women in the welding class. the instructor
wants to appoint one person to be in charge of project. what is the
probability that this person will be a man? simplify if necessary.

Step-by-step explanation:

If the instructor chooses a person to be in charge of a project, he has 20 + 15 = 35 people to choose from. The probability that the person will be a man, therefore, is 20 out of 35. As a simplified fraction:

In other words, the simple probability that the person will be a man is 4 out of 7.

4400

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m