20. a photographer takes an average of 15 pictures per session. the total
number of pictures pes) is a function of the number of sessions
a. identify the independent and dependent variables.
b. what values of the domain and range make sense for this situation?
explain.
c. write a function to represent the total number of pictures taken. then
determine the number of pictures taken in 22 sessions.

Two red blood cells each have a mass of 9.0 multiply. gif 10-14 kg and carry a negative charge spread uniformly over their surfaces. the repulsion arising from the excess charge prevents the cells from clumping together. one cell carries −2.50 pc of charge and the other −3.10 pc, and each cell can be modeled as a sphere 7.5 μm in diameter. (a) what speed would they need when very far away from each other to get close enough to just touch? assume that there is no viscous drag from any of the surrounding liquid. answer is: 321 m/s how do i find this (b) what is the maximum acceleration of the cells in part (a)? answer is: 1.38e+10 m/s2 how did they find this answer

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?