Answer:
y = 9
Step-by-step explanation:
To solve this question we will use the property of perpendicular lines,
Where and are the slopes of two lines perpendicular to each other.
Slope of a line passing through two points and is given by,
Slope of a line which passes through the points A(4, 2) and B(-1, y) will be
Slope of the line given in the graph [passing through (2, 4) and (-5, -1)]
From the property of perpendicular lines,
5y - 10 = 35
5y = 45
y = 9
Answer:
n>=6
Step-by-step explanation:
1-0.4ⁿ>=0.99
1-0.99>=0.4ⁿ
0.4ⁿ<=0.01
Apply log10:
Log10(0.4ⁿ)<=log10(0.01)
n×log10(0.4)<=log10(0.01)=-2
Because log10(0.4)=-0.39794 is negative we get:
n>=5.028.
Since n is integer, we have n>=6
Answer:
0.44 miles/ mins
Step-by-step explanation:
Speed = distance/time
Given
Distance = 2.0 x 10^4 miles
Time = 4.5 x 10^4 mins
Therefore
Speed = 2.0 x 10^4 /4.5 x 10^4
= 0.44 miles /minutes