Answer:
1:4
2:8
7:28
Step-by-step explanation:
Answer:
-4 or -3
Step-by-step explanation:
Calculate the determinant:
D = b^2 - 4ac = 49 - 48 = 1
Apply the formula:
x = (-b +- sqrt(D))/2a = (-7 +- 1)/2 = -4 or -3
Answer:
The probability that a randomly chosen Ford truck runs out of gas before it has gone 325 miles is 0.0062.
Step-by-step explanation:
Let <em>X</em> = the number of miles Ford trucks can go on one tank of gas.
The random variable <em>X</em> is normally distributed with mean, <em>μ</em> = 350 miles and standard deviation, <em>σ</em> = 10 miles.
If the Ford truck runs out of gas before it has gone 325 miles it implies that the truck has traveled less than 325 miles.
Compute the value of P (X < 325) as follows:
![P(X](https://tex.z-dn.net/?f=P%28X%3C325%29%3DP%28%5Cfrac%7BX-%5Cmu%7D%7B%5Csigma%7D%3C%5Cfrac%7B325-350%7D%7B10%7D%29%5C%5C%3DP%28Z%3C-2.5%29%5C%5C%3D1-P%28Z%3C2.5%29%5C%5C%3D1-0.9938%5C%5C%3D0.0062)
Thus, the probability that a randomly chosen Ford truck runs out of gas before it has gone 325 miles is 0.0062.