A pair of similar cones have a scale factor of 3:5. What is the ratio of their surface areas? Please type your answer in the form of a ratio (x:y) with no spaces.

Really need on these. i have no idea what to do

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).

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100