Iam a polyhedron.
all of my faces are the same.
all of my faces are equilateral triangles.
i have a eight faces.
what am i?

What is the missing step in this proof ?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

Rewrite so the subject can be y in the formula d=m-y/y+n