I need some help for two of the lines.

Step-by-step explanation:

I believe these are correct, but of course I could also be wrong, so please let me know.

Remember that if the shaded space is above the line then the sign will be either "greater-than" or "greater-than-or-equal-to", if the shaded space is below the line then it will be the "lesser-than" varients. You only use the greater-than sign when the line is dotted, and the greater-than-or-equal-to sign when it's not, and same goes for the lesser-than varients.

I hope the short explaination makes sense. If you need more help or don't understand something, please let me know. I'd be happy to help :)

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation:

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct