What’s 50+60-70 tell me

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)