Find the height of cylinder when volume is 154 cm^3 volume and radius is 3 cm

What is the value of x? enter your answer in the box. (cm)

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!