PLEASE HELP ME 100 POINTS A. 6.3 in
B. 9.1 in
C. 12.6 in
D. 25in
E. 50.2 in

Evaluate cos2θ for cosθ = square root of 3/2

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Renee hiked for 6 3/4 miles. after resting, renee hiked back along the same route for 5 1/4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.