sign on the roadway at the top of a mountain indicates that for the next 4 miles the grade is 9.5° (see figure). Find the change in elevation for a car descending the 4-mile stretch. (Round your answer to two decimal places.)

Draw a picture of this.  If the grade is 10.5 degrees, then the value of the angle is 90 - 10.5 = 79.5.

The length of this side, the hypotenuse, is 4

The base angle is 90.

therefore, the third angle is 10.5.

Step-by-step explanation:

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

5/12, or 5: 12

step-by-step explanation: