posted by osi .
new flat- screen TVs flash even faster than older TVs. Since dogs need a flicker frequency rate of 75, DOGTV works as intended only on newer TVs. One type of new Tv flashes 500 frames each second. How many more frames does it flash than an older TV with a flicker frequency rate of 690 in p seconds? On a separate piece of paper, show how you created your expression and explain your work. please give me the answer and show me how to do it or figure out the problem.