Respuesta :

Answer:

70 times

Step-by-step explanation:

12 * 5 = 60

28 * 5 = 140

140/2 = 70

Cricetus

"70 times" your friend can clap his hands in 0.5 minutes.

According to the question,

Friend clap,

  • 28 times in 12 seconds.

then,

→ [tex]12\times 5 =60 \ times[/tex]

→ [tex]28\times 5 = 140 \ times[/tex]

In 0.5 minutes, he clap.

= [tex]\frac{140}{2}[/tex]

= [tex]70 \ times[/tex]

Thus the response above is appropriate.

Learn more about time here:

https://brainly.com/question/16611166