What is 2.5 and 2 and 3.5 rounded to the nearest tenth

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?