Any book recommendations I wanna have a list for summer (don't judge me books are amazing!!)

Which value is not a solution of 8x^3 – 1 = 0

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Solve the triangle. a = 21°, c = 105°, c = 5