Me! how do you convert a rate into a unit rate? give an example, so i can better under stand. you

What is the value of x in this triangle? a. 53° b. 62° c. 65° d. 118°

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go