Abox contains 5*10^3 paper clips. the mass of each paper clip in the box is 8*10^-4 kilogram. what is the total mass of the paper clips in the box?
plz i would really appreciate it, thx to who ever answers!

What is the value of y? round to the nearest tenth

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.

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.