Evaluate expression
a) -19 + 3(-13 + 4*3)

b) | -7(2) |

c) 15 – 3 | - 4-2 |

In the pendulum formula t=2pi. read the problem on the picture ! ; $; $; ! ; ! ; ! ; )$; ! ; ! ; ! ; $; $; $! ; ! ; ); $; $$

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.