2i+3+the square root of -4. i dont understand how to write this expeession as a complex number in standard form. a step by step would be ! you!

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.