Answer:
10 is unbiased
11 is biased
Step-by-step explanation:
10 is unbiased
11 is biased
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we know there are 5280 feet in 1 mile, and there are 3600 seconds in 1 hour.

9514 1404 393
Answer:
√869 ≈ 29.48 square units
Step-by-step explanation:
The vector cross product is ...
(3·1 -5·4, -6·1 +2·4, 6·5 -2·3) = (-17, 2, 24)
The area is the magnitude of this vector, so is ...
√((-17)² +2² +24²) = √(289 +4 +576) = √869 ≈ 29.48
The area is about 29.48 square units.
Answer:
7x+12y
Step-by-step explanation:
Simplify
4x+9y+3(x+y)
<em>Use the distributive property to multiply 3 by x+y.
</em>
4x+9y+3x+3y
<em>Combine 4x and 3x to get 7x.
</em>
7x+9y+3y
<em>Combine 9y and 3y to get 12y.
</em>
7x+12y
Answer:
Step-by-step explanation:
Chords having equal measures are equidistant from the center of the circle.
Since, VW = XY
Therefore, ZP = ZR = 15 units
A perpendicular line drawn from the center of a circle to the chord is the bisector of the chord.
VR = WR = 20 units
By applying Pythagoras theorem in ΔZRV,
ZV² = ZR² + VR²
ZV² = (15)² + (20)²
ZV = √(225 + 400)
ZV = √625
ZV = 25 units
Therefore, measure of radius ZV = 25 units.
VW = XY [Given]
Therefore, XY = 2(20)
= 40 units