Jonas has $400 he withdraws $30 per week which number line shows how many weeks(w) till he reduces his balance to $190. sorry I meant to put math lol but still if you can help me out that'd be greatly appreciated

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.