Answer:
The proportion of piano prices higher than the electric piano is 98.3%
Step-by-step explanation:
The first thing to do here is to calculate the standard score of the price of the electric piano given.
Mathematically, this is
z-score = (x-mean)/SD
where mean is 3000 and SD is 200, x is 2576
z-score = (2576-3000)/200 = -2.12
Now we proceed to calculate the probability of this z-score
The probability we are trying to calculate is
P( x > $2576) or simply P ( z > -2.12)
Using standard score probability calculator or table, we have
P(x>2576) = 1 - P(x<2576)
But, P(x<2576) = 0.017003
P(x>2576) = 1 - P(x<2576) = 0.983
This is same as 98.3%
Both have D as the correct answer.
Answer:
Step-by-step explanation:
According to the trigonometric ratios the tangent of an angle is the ratio of perpendicular to base, i.e.
In the provided triangle the perpendicular is 8 and base is 15.
Compute value of tan <em>A</em> as follows:
Thus, the value of tan <em>A</em> is 
.
Answer:
y=3x/2 -8
Step-by-step explanation:
2y/2 = 3x/2 + 10/2
y = 3x/2 +5
(y-(-5)) = 3/2 (x-2)
y+5 = 3x/2 - 3
y= 3x/2 - 8
