I’m literally begging someone please help (just number 10. show work)

Evaluate cos2θ for cosθ = square root of 3/2

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

Acaterer charges $500 plus $30 per guest to cater a wedding. walt and traci don't want to spend more than $8000 on catering. write and solve an inequality in terms of the number of guests, g, that can be invited. a) 30g ? 8000; g ? 267 b) 500g < 8000; g < 16 c) 500 + 30g < 8000; g < 250 d) 500 + 30g ? 8000; g ? 250