Afraction equal to 1/5 and 7/8 with a denominator of 40?

If cos(θ)=2853 with θin q iv, what is sin(θ)?

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.

The sum of a number and 5 times the number is 18.find the number