Answer:
a) The probability of selling less than 100 gallons (x≤1) is P=0.16.
b) The mean number of gallons is M=80 gallons.
Step-by-step explanation:
The probability of selling x, in hundred of gallons, on any day during the summer is y(x)=0.32x, in a range for x from [0;2.5].
The probability of selling less than 100 gallons (x≤1) is then:
The mean number of gallons can be calculated as:
(x+y)^2 = (x+y)(x+y) = x*x +x*y +y*x +y*y = x^2 + 2xy +y^2 so what not equal
x^2 +y^2
hope helped
Be
P = (21, 12)
Q = (19, -8).
The vector u will be given by
u = PQ = Q-P = (19, -8) - (21, 12) = (- 2, -20)
The magnitude of this vector is
u = ROOT ((2 ^ 2) + (20 ^ 2)) = 20.1
Therefore, the vector v as it is in the opposite sense to u will be given by
v = 0.4i + 4j.
Its magnitude is
v = Root((0.4^2)+(4^2))=4.02
Dividing both magnitudes it is verified that the magnitude of u is five times greater than that of v
20.1 / 4.02 = 5.
Finally, the correct answer is
v = 0.4i + 4j
Answer:
The regular price was $30.
Step-by-step explanation:
The bookstore sells used books at 40% discount off the price of new books. This means, after the discount, the price of a used book will be 100% - 40% = 60% of the original price.
Now, if the price of the used book is $18, we know that is is 60% of the price of the book when it was new.
Let us call , the price of the book when it was new, then we know that
<em>(this says that 60% of the original price is $18.</em><em>)</em>
We solve for and get
The price of the book was $30 when it was new.