Which ones are in standard form, and which ones are not? And, why ?!

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

What expression is equivalent to log3(x+4)