Yes it is 20 ft. 4 3 foot planks is 12ft. and 6 16 in planks are 96 inches, which divided by 12 is 8 (feet) so 12 + 8 is 20
<span>8.5k+7-7.5k=9
first combine like terms </span>8.5k and -7.5k to get 1k or just k
k+7=9
subtract 7 from both sides to isolate k
k = 2
The grade is the ratio of rise to run, i.e. the slope aka the tangent.
Answer: (a) 6 degrees
For part b, the road is the hypotenuse c of a right triangle whose tangent of the small angle is 1/10. The height h or rise is the side opposite the small angle.
We could just take the sine of the angle we got but let's get it from the tangent exactly.
Dividing by squared cosine
Answer: (b) Rise of 0.199 km
You have to find the area of the square so 5x10 then the area of the triangle 5is parallel to the one above so what’s also 5 16 is the total high of the square and triangle combined . So you’d take 10 out of 16 so 6 and 5 beings the sides of the triangle , then you’d add up the two sides and just subtract the area of the no Sade’s and ur left w/ the shaded region
