What is the least common multiple of 3,7,9

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.

Ineed to know how to write question one in mathematical terms

Urgent? will give brainliest to the first correct answer what is the area of the figure?