Se tienen ocho monedas en apariencia iguales, aunque se sabe que una de ellas es más liviana que las otras siete. Además, hay una balanza con dos platillos y lo único que se puede hacer con ellos es poner monedas a uno y otro lado, y pesar solamente dos veces. Luego de esas dos pesadas, se supone que uno tiene que estar en condiciones de poder decir cuál es la moneda diferente (más liviana).

what?

step-by-step explanation:

what do you need with. i love quadrants. can you tell me ?

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).