Find inverse of a matrix

Matrix row 1 = [2 3] row 2 = [5 7] find the inverse of this matrix

find the inverse of a matrix

matrix row 1 = [1 .5] row 2 = [0 .5] find the inverse

Find the inverse of a matrix

Matrix row 1 = [0 1] row 2 = [1 0] find the inverse of the matrix.

Finance

Given below are the present value factors for $1.00 discounted at 8% for 1 to 5 periods. Each of the following items is based on 8% interest compounded annually from day of deposit to day of withdrawal. PERIODS PRESENT VALUE OF $1 DISCOUNTED AT 8% PER PERIOD 1 0.926 2 0.857 3 0.794 4 0.735 5 0.681 What amount should be deposited in a bank today to grow to $1000 3 years from today? (a) $1000/0.794 (b) $1000 X 0.926 X 3 (c) ($1000 X 0.926) + ($1000 X 0.857) + ($1000 X 0.794) (d) $1000 X 0.794

Probability

An experimental test to detect a particular type of cancer indicates the presence of cancer in 90% of individuals known to have this type of cancer, and in 15% of individuals known to be cancer-free (false positive). One hundred individuals volunteer to take the test. Of the 100, 60 are known to have the cancer, and 40 are known to be cancer-free. If the test indicates that one of the individuals, randomly chosen, has the cancer, what is the probability that he or she is actually cancer-free?