The following sulphur isotopic data were obtained for a sulphide ore in mexico.

sample 

34s galena (ga) ‰ 

34 s sphalerite (sp) ‰ t in c

1 -1.15 +0.95

2 -1.11 +0.87

3 -1.42 +1.03

4 -1.71 +0.01

the fractionation, sp-ga, between sphalerite and galena has been found to vary with temperature as:

6

2

sp 1.02 10

ga

x

t

 =

a. calculate the temperature in c at which each mineral pair equilibrated and fill the results in the

table above! (show one example of the calculation procedure here! )

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

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

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94