![](http://www.alamy.com/thumbs/6/39817C63-B9D1-47AE-B04B-CE6BC9E0AA51/HWP8TK.jpg)
Bulb Illuminates mathematics and business icons on the school chalk board. 3d illustration.
Size: 3600px × 2400px
Photo credit: © Dmitrii Kotin / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: 3d, angle, background, blackboard, blueprint, board, brain, bulb, business, calculator, chalk, chalkboard, class, classroom, college, cone, cube, drawing, drawn, education, engineer, equal, equation, formula, graph, hand, icon, icons, idea, illuminates, illustration, integral, light, lighten, limit, lines, math, mathematics, ruler, school, science, set, sign, sketch, sphere, square, study, symbol, university