Answer:
$13,954.90
Step-by-step explanation:
We assume James wants to fence the four sides of a rectangle with the given dimensions. The perimeter length of a rectangle is ...
P = 2(L +W) = 2(124.6 ft + 138.7 ft) = 526.6 ft
The material cost is the product of the number of feet and the price per foot:
cost = $26.50/ft × 526.6 ft = $13,954.90
Let the other 2 unknown sides be y n z
look at the two smaller triangles inside
y^2 = 12^2 + x^2 and
z^2 = 21^2 + x^2
from the biggest triangle
(12+21)^2 = y^2 + z^2
substituting
(12+21)^2 = (12^2 + x^2) + (21^2 + x^2)
33^2 = 12^2 + 21^2 + 2x^2
2x^2 = (33^2 - 12^2 - 21^2)/2 = 504
x^2 = 252
x = 15.9
ans is B
You'll need to calculate the applicable z-score:
(given value of x) - (mean value)
z = -----------------------------------------------
standard deviation
370-400 -30
Here, z = --------------- = ---------- = -0.3
100 100
Use either a table of z scores or your calculator to determine the area under the standard normal curve to the left of z = -0.3.
According to my TI-83 Plus calculator, this area is 0.382.
The probability of selecting at random a score less than or equal to 370 is 0.382.
You find the hundredth and go to the thousandth and if it’s more than four round up if it’s less it’s rounded since it’s a 2 you round down making it 2.93
Answer: Your complete answer would be -2x^9, if I'm not mistaken.
