If a= [ 1 5 -3 4] and b= [ 2 6 6 -1] find ab! plzzz

A = -7 and B = 71

Step-by-step explanation:

A= [ 1 5 -3 4]

(1)(5)-(3)(4) =

5 + (-12)

A = -7

B= [ 2 6 6 -1]

(2)(6)(6) - 1

72 + -1

B = 71

image for option 4

step-by-step explanation:

i just know the internet

134.6 us dollars

step-by-step explanation:

1 us dollar = 1.33 canadian dollars

so, 150 us dollars = 150 × 1.33 = $199.5.

in canada, the money mitchell spent = 20 canadian dollars.

remaining canadian dollars with him = 199.5 - 20 = 179.5.

after mitchell returned to us, he exchanged the remaining canadian dollars to us dollars.

179.5 canadian dollars = 179.5 × 0.75 = 134.6 us dollars.