A circle is centered on point B. Points A, C and D lie on it's circumference. If ABC measures 40 degrees, what does ADC measure?

I will mark brainliest of correct.

What is the equation of the line shown in this graph?

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.