Which is the best estimate for (2.8x10^3)( 4.1x10^6) written in scientific notation? a) 7 x 10^9 b) 1.2 x 10^10 c) 1.5 x 10^10 d) 12 x 10^18 a boi out pls, struggle is real

Jane is cooking beans and rice for dinner tonight. she has 4 cans of black beans, 6 cans of red beans, and 3 cans of garbanzo beans in her cupboard. if she grabs a can of beans without looking at the label, what is the probability of her making black beans and rice for dinner?