order the numbers from least to greatest. 10/8, 4/3, 1.4, 1.08

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

If it 8 inch candle burns at 7/10 inch per hour and a 6 inch candle burns at 1/5 inch per hour after how many hours would both candles be the same height