Please help, what is the measurement of BC?
1 answer:
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Answer:
There seems to be m linear relation between te data.
Negative relationships between variables.
Step-by-step explanation:
Speed(X)
60
60
60
60
80
80
80
80
100
100
100
100
120
120
120
120
140
140
140
140
Lifetime (Y) :
4.6
3.8
4.9
4.5
4.7
5.8
5.5
5.4
5
4.5
3.2
4.8
4.1
4.5
4
3.8
3.6
3
3.5
3.4
The linear regression equation obtained by fitting the data using a regression model is :
ŷ = -0.017X + 6.03
From the regression plot, the relationship between the two variables, speed and lifetime is negative, that is an increase in one variable will lead to a corresponding decrease in the other.
Answer:
- 25 cm
Step-by-step explanation:
The chord and the segment between the centers form the diagonals of a kite with each pair of side being the radius of the circles.
As we know the long diagonal bisects the shorter one and they are perpendicular.
<u>Using Pythagorean, lets find the distance between the center of a greater circle and the chord:</u>
- 52² - (40/2)² = 2304 ⇒ √2304 = 48 cm
<u>The distance from the center of smaller circle and the chord is:</u>
- 63 - 48 = 15 cm
<u>Now using Pythagorean again, find the radius of the smaller circle:</u>
- 15² + (40/2)² = 625 ⇒ √625 = 25 cm
