Answer:
d =
Step-by-step explanation:
Given that W varies jointly as L and d² then the equation relating them is
W = kLd² ← k is the constant of variation
To find k use the condition W = 140 when d = 4 and L = 54, thus
140 = k × 54 × 4² = 864k ( divide both sides by 864 )
= k , that is
k =
W = Ld² ← equation of variation
Multiply both sides by 216
216W = 35Ld² ( divide both sides by 35L )
= d² ( take the square root of both sides )
d =
Answer:
70 m^2.
Step-by-step explanation:
Area of the triangle = 1/2 * base * height.
Counting the squares on the coordinate plane:
Base = 7, height = 5
Each square = 2 meters
So the area = 1/2 * 14 * 10
= 70m
This is the working but there are 2 other methods that can help you arrive to the same answer
Answer:
mark up is 250% we do 4200/ 1680 then multiply by 100 to get that answer