Multiple choice
Which of the following statements are true? (matrices and determenents)

1. If any row of a square matrix is zero, its determinant is zero.

2. If all numbers in a matrix are equal, its determinant is zero.

3. The determinant of any identity matrix is zero.

4. The determinant of a matrix with all positive numbers is always positive.

5. The determinant of any zero matrix is zero.

(multiple choice)

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.