Do i need a comma in this sentence?

last week we worked on an assignment in class.

Mangrove have two types of specialized root systems t f

Read the following sentence from excerpt of the narrative of the live of frederick douglass and define the bolded word: "why master was so careful of her, may be safely let to conjecture." question 10 options: a) prayer or hope b) guesswork or speculation c) relief or ease d) disapproval or disappointment

Which graphical source would best show the average voting age of americans, organized by income? a. schematics b. infographic c. map d. chart