Pls help for the love of yeetus deleteus

Sketch one cycle if the cosine function y=2cos2theta

Can someone answer this question for me

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.