What is the value of x PLEASE HELP

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Could somebody me with this radical simplification?

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°