Answer:Eight to 12 inches is usually adequate. If drainage is a problem, or if the plants you are growing prefer drier soil, the bed could be taller and filled with a porous growing medium.
Step-by-step explanation:
Given :
To find :-
Solution :-
Given equation ,
Answer:
23°
A complementary angle is 90°, so you can do 90°-67° =23°
