Suppose that IQ scores have a bell-shaped distribution with a mean of 105 and a standard deviation of 15. Using the empirical ru
1 answer:
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Answer:
see explanation
Step-by-step explanation:
The area (A) of a square is calculated as
A = s² ( s is the side length )
Given A = 55 , then
s² = 55 ( take the square root of both sides )
s = ≈ 7 in ( to the nearest whole inch )
s ≈ 7.4 in ( to the nearest tenth of an inch )
The scientific notation: 
Answer: B. 3.2 × 10^8
Answer: B. 3.2 × 10^8
Answer:
Equation of the circle (x-3)²+(y-5)²=(6.4)²
x² -6x +9 +y² -10y +25 = 40.96
Step-by-step explanation:
<u><em>Step(i):-</em></u>
Given endpoints of diameter P(−2, 1) and Q(8, 9)
Centre of circle = midpoint of diameter
Centre =
Centre (h, k) = (3 , 5)
<u><em>Step(ii):-</em></u>
The distance of two end points
PQ =
PQ = √164 = 12.8
Diameter d = 2r
radius r = d/2
Radius r = 6.4
<u><em>Final answer:-</em></u>
Equation of the circle
(x-h)²+(y-k)² = r²
(x-3)²+(y-5)²=(6.4)²
x² -6x +9 +y² -10y +25 = 40.96
x² -6x +y² -10y = 40.96-34
x² -6x +y² -10y -7= 0