By Alexandra Banner, CNN It’s been 100 days since Nancy Guthrie disappeared, with few concrete answers emerging in the case. It’s also reigniting debate over whether crime dramas like “CSI” have inflated the public’s expectations of which cases police can realistically solve — and how quickly. Here’s what else you need to know to get up to speed and on with your day. 1?? High prices From groceries to gas to rent, rising prices are straining household budgets, and many people feel it’s harder to get ahead — or even just stay afloat. A new CNN poll finds 76% of…