HELP look at THE PICTURESSS I WILL GIVE YOU POINTS AND BRAINLIEST ANSWERS IF YOU KNOW DON"T ANSWER IF YOU DON'T KNOW JUST FOR THE POINTS and take your time to think take as much time you need plzz help

Express the following number in scientific notation. 0.026890 =

Why did southern business leaders want to increase the number of slaves

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.