Please help this is the last question on my test !

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?