please someone help me with these math exercises

label Mathematics
account_circle Unassigned
schedule 1 Day
account_balance_wallet \$5

Oct 20th, 2017

3.   Slope = 5/170       rise = 350 m       run = ?

slope = rise/run

run = rise/slope

run = 350/5/170 = 350 * 170 / 5 = 59500 / 5 = 11900 m

4.     Slope = 0.48       rise = ?       run = 124 m

slope = rise/run

rise = run * slope

rise = 124 * 0.48 = 59.52 = 59.5 m

5.    4 cm  drop = 1.5 m horizontal distance

Now multiply by 20 on both sides, we get

20 * 4 cm  drop = 20 * 1.5 m horizontal distance

40 cm drop = 30 m horizontal distance

Hence  the drop should be 40 cm to have the horizontal distance of 30 m.

7.   rise = 8    run = 5    slope = ?

slope = rise / run

slope = 8/5

slope = 1.6

now    tan (theta) = slope

theta = tan^-1 slope

theta = tan^-1 (1.6)

theta = 57.9 degree

8.(a)    rise = 5       run = 9

slope = rise/run

slope = 5/9

slope = 0.6

(b)    tan (theta) = slope

theta = tan^-1 slope

theta = tan^-1 (0.6)

theta = 30.9 degree

9.      7% grade means     rise = 7      run = 100

now    slope = rise / rune

slope = 7 / 100

tan (theta) = slope

theta = tan^-1 slope

theta = tan^-1 (0.07)

theta = 4 degree

Oct 11th, 2014

...
Oct 20th, 2017
...
Oct 20th, 2017
Oct 20th, 2017
check_circle