A strip of ribbon was cut in to 2 lengths in the ratio5:2.if the shorter strip is 84cm what is the length of the longer strip

What is the value of x in the diagram below?

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?

Which equation can be used to determine the reference angle, r, if 0=7 pi/12?