Mhanifa can you please help? This is due asap! Look at the pic attached below. I will mark brainliest. Guys please don't put random answers thanks :)

Can someone pls ! pls answer all. no explanation needed..

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

If the value of cos330°is√3/2 then find cos 165°.