50 - 55 million year ago. And I think for the first one reptiles were around.
The problem statement gives the correct answers for parts (a) and (b). The total number of roots of the characteristic polynomial is the dimension of the matrix: 6. The eigenvalues are the zeros of the characteristic polynomial, 3 (multiplicity 2), 6 (multiplicity 3), and -1.
(c) The matrix is not invertible when one or more eigenvalues is zero. None of yours are zero, so the matrix is invertible.
45.....................................................
Answer:
96
Step-by-step explanation:
5:4
Both sides have to be equal.
120 divided by 5 is 24.
4 times 24 is <u>96</u>.
They were supposed to flip 16/6 so that it's 6/16. Then multiply 5/3 by 6/16 to get 30/48, which becomes 5/8.