If A(2,3) B(5,4) C(7,8) .D is the midpoints of side BC find equation and length of median AD​

What is the size of the matrix resulting from

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Find the zeros of each function. f(x) = 6x^2 - 7x - 20