1. Diversas industrias metalúrgicas operan en base al derretimiento de los metas en grandes hornos industriales, para poder darles forma o hacer aleaciones. que tipo de estado es

liquid state. (Estado liquido)

Explanation:

I will answer in English.

When you want to give a shape to a metal, the best option is using metal in liquid state (because as you know, the liquids take the shape of the container where they are in).

So the industries heat the metals until the metals reach the fusion point (so they change of phase, from solid to liquid)

Then the liquid metal is placed in a special container with the wanted shape.

pla·gia·rism

/ˈplājəˌrizəm/

learn to pronounce

noun

the practice of taking someone else's work or ideas and passing them off as one's own.

explanation:

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.