Which number has the same value as 3 times 1/10

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

What numbers are included in the set of integers? what numbers are not included?

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