AQR Final Review 12/17

Front

What is the size of a matrix with 3 rows and 3 columns?

Back

3 x 3

Front

Convert 75,000,000 to scientific notation.

Back

7.5 x 10^7

Front

Back

0.9

Front

What is the result of B - A if B = [[-3, 1], [7, -1]] and A = [[1, 0], [1, -4]]?

Back

[[4, 0], [-6, 0]]

Front

What is the first step in the 4-Step problem solving process?

Back

Understand the Problem

Front

Define a matrix.

Back

A matrix is a rectangular array of numbers arranged in rows and columns.

Front

What is scientific notation?

Back

A way of expressing numbers as a product of a coefficient and a power of 10.

Front

How do you add two matrices?

Back

Add corresponding elements from each matrix.

Front

What is the formula for finding the determinant of a 2x2 matrix?

Back

For a matrix [[a, b], [c, d]], the determinant is ad - bc.

Front

What is the difference between a scalar and a vector?

Back

A scalar is a single number, while a vector has both magnitude and direction.