Simplify the expression

(4i)(2i)(-9i)

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?

Amoving truck rental costs a flat fee of $75 and $2 per mile driven. if you drive a moving truck for 10 miles, how much is the rental for the moving truck?

Could someone me with this, ? : )