Answer:
27.5
Step-by-step explanation:
The formulas jus the top line + the bottom line divided by two then multiplied by the height (dotted line)
Call this piece of the plane S. Parameterize S by the vector function
s(u, v) = u i + v j + (28 - 2u - 3v)/4 k
with 1 ≤ u ≤ 4 and 2 ≤ v ≤ 6. Take the normal vector to S to be
∂s/∂u x ∂s/∂v = 1/2 i + 3/4 j + k
which has norm √((1/2)^2 + (3/4)^2 + 1^2) = √29/4
The area of S is then
Answer:
(a)They were treated like slaves.
See, pls, the offered decision:
1. this ratio has another form: 2x/3x/4x;
2. the difference between the largest and the smallest is 4x-2x=10.
Then x=5, and the sequence of numbers is 10/15/20, where 15 is the middle number.
Answer: 15.