Can someone help me with this one please

Evaluate cos2θ for cosθ = square root of 3/2

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points