What is 5(−3.4k−7) (3k 21) in its simplest form

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Find the smallest number by which the given number should be divided to make a perfect cube(with steps or the answer will get reported) a.108 b.2187

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?