How would you write -5.6 x 10-3 in standard form?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Can someone pls ! pls answer all. no explanation needed..

An apartment has a replacement cost of $950,000 and contents valued at $1,450,000. it has a classification of a and a territory rating of 3. find the annual premium a) $10,185 b) $9,230 c) $3,155 d) $13,830