exam Maths Puzzle Numerical Ability

7. The altitude of a regular triangular pyramid is the segment connecting a vertex to the centroid of the opposite face. A regular triangular pyramid has edges of length 6 inches. How tall is such a pyramid, to the nearest hundredth of an inch?

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exam Other Question

for the polynominal, one zero is given. Find all the others:
f(x)= x^4 + 10x^3 + 27x^2 + 10x + 26; i Two earthquakes differ by 1.0 when measured on the richter scale. How would the seismographic readings differ at a distance of 100 kilometers from the epicenter? How do their intensities compare?