When the radius doubles, does the area of the circle double?

a) 4π cm2; 8π cm2; no
b) 4π cm2; 16π cm2; no
c) 4π cm2; 16π cm2; yes
d) 4π cm2; 8π cm2; yes

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours

Select all of the categories that apply for the figure below. quadrilateral, trapezoid, parallelogram, rhombus, rectangle, square