The steepness, or grade, of a highway or railroad is expressed as a percent. In the photo of the cog railway at Pike's Peak, in Colorado, the grade is 18%. Thus, for every 100 ft of horizontal run, the train rises 18 ft. Find the angle of the inclination of the railway. a. 10.2° c. 7.85° b. 15.7° d. 19.2°

10.20°

Step-by-step explanation:

Given that:

Grade = 18% ; rise = 18ft

For every 100 feets, plane roses 18%

The question can be solved using Pythagoras rule :

Tangent θ = opposite / Adjacent

Tan θ = 18 / 100

Tan θ = 0.18

θ = tan^-1(0.18)

θ = 10.203973

θ = 10.20°

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: