El sr. jorge se dedica a reparar y construir diferentes estructuras metálicas. para realizar algunos trabajos envió a su ayudante juan a comprar los siguientes materiales. 1. barras de solera de las siguientes medidas: 1 1/8 in, 1 1/4 in y 1/2 in. al llegar a la ferretería, le muestran un manual donde aparecen las medidas que están disponibles. a) 0.933 in b) 0.4375 in c) 0.5 in d) 1.375 in e) 1.125 in f) 1.933 in g 1.250 in h) 1.012 ¿cuáles medidas del manual debe pedir juan?

For this case what we should do is to rewrite the mixed numbers as fractions and then as decimals.

Writing the mixed numbers as fractions we have:

We now write the fractions as decimals.

We have then:

The measures of the manual that John should ask are:

c) 0.5 in

e) 1.125 in

g 1.250 in  

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

b

step-by-step explanation:

i dont know