3let a = 2 2 3. (10 рoints) . which of the following statement is false? -1 a. for arbitrary 2 x 2 matrices b, c, if ba = bc then a = c b. at is invertible. c. for arbitrary 2 x 2 matrices b, c, if ab = ac then b = c d. aa-1 — a-1а. e. a1is a symmetric matrix.

Natasha spent 1 1/2 hours on the beach. she fell asleep for 3/4 of the time she was on the beach and then woke up with a terrible sunburn.how many hours was natasha asleep on the beach?

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.

The ratio of wooden bats to metal bats in the baseball coach’s bag is 2 to 1. if there are 20 wooden bats, how many metal bats are in the bag?