In the high school band , there are 2 percussionists on the sideline to every 7 marching instruments. If they have 10 percussionists how many marching instruments do they have?

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?

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )