Read and write the number in two other forms 70,000,000 + 8,000,000+20,000+8

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.

Evaluate cos2θ for cosθ = square root of 3/2