97% of 11 is:
Answer:10.67
Answer:
80%
Step-by-step explanation:
Percentile rank = (number of scores lower or equal to 82 / total number of scores) * 100%
Percentile = (8 / 10) * 100%
= 0.8 * 100%
= 80%
Answer:
400 m^2.
Step-by-step explanation:
The largest area is obtained where the enclosure is a square.
I think that's the right answer because a square is a special form of a rectangle.
So the square would be 20 * 20 = 400 m^2.
Proof:
Let the sides of the rectangle be x and y m long
The area A = xy.
Also the perimeter 2x + 2y = 80
x + y = 40
y = 40 - x.
So substituting for y in A = xy:-
A = x(40 - x)
A = 40x - x^2
For maximum value of A we find the derivative and equate it to 0:
derivative A' = 40 - 2x = 0
2x = 40
x = 20.
So y = 40 - x
= 40 - 20
=20
x and y are the same value so x = y.
Therefore for maximum area the rectangle is a square.
Answer:
B=208.72
Step-by-step explanation:
June 22
July: 22+ 22x (1+10%) = 46.2
Auq: 46.2+ 22 (1+10%) x (1+10%)= 72.82
Sep: 72. 82+ 22 (1+10%)³= 102.102
Oct: 102.102 + 22 x(1+10%)⁴= 134.3122
Nov: 134.3122 + 22×(1+10%)⁵= 169.74342
Dec:169.74342 +22(1×10%)⁶ =208.717762
=208.72
The calulation of Compound interest )
