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Solve by poisson distribution: A store has an average of 90 customers per hour. a) What is prob. that for 2 minutes the store does not receive any customers? b) Among 100 identical stores, how many would not receive any customers?
General
10 months ago
A hair dryer is a duct of constant diameter in which a few layers of electrical resistors are placed. A small fan draws air in and forces it past the resistors, where it heats up. If the density of the air is 1.2 kg/m3 at the inlet and 0.98 kg/m3 at the outlet, determine the percentage increase in air velocity as it flows through the dryer.
General
10 months ago
determine if the following vectors are linearly independent or dependent u=(-4,5) v=(2,7)
General
10 months ago
Two point charges are located on the positive x-axis of a coordinate system. Charge q1 = 1.0 nC is 2.0 cm from the origin and charge q2 = -3.0 nC is 4.0 cm from the origin. What is the total force exerted by these two charges on a charge q3 = 5.0 nC located at the origin? Neglect gravitational force.
General
10 months ago
Combine like terms. 2, y, cubed, minus, 4, x, squared, minus, 4, minus, 1, plus, 3, x, squared, minus, 3, y, cubed, minus, y, cubed 2 y 3 − 4 x 2 − 4 − 1 + 3 x 2 − 3 y 3 − y 3 2y 3 −4x 2 −4−1+3x 2 −3y 3 −y 3
General
10 months ago
8x+4y-2x+y
General
10 months ago
2a+4c+6a
General
10 months ago
Solve. 0.006(9-k) + 0.09(k-4) = 1.
General
10 months ago
A canner has 2 products: citrus and tropical, the citrus has 70% orange juice and 30% mango juice, the tropical has 80% mango juice and 20% orange juice. How many liters of each product can I pack if I have 450 of orange and 800 liters of mango?
General
10 months ago
9(34x-9)-7
General
10 months ago
Hello, I need you to help me carry out the answer operation of a mathematical problem for second grade. A building has 50 windows, 36 of which are closed. How many windows are open?
General
10 months ago
Find the volume of the solid bounded in the first octant of the coordinate planes and by the plane 3x+4y+2z=12
General
10 months ago
SIMPLE COMMERCIAL DISCOUNT 1) A bill of R$ 70,000.00, with 90 days to expire, was discounted by a bank at the rate of 2.70% per month. Calculate the net amount delivered or credited to the customer. A: BRL 64,330.00.
General
10 months ago
7+ 8
General
10 months ago
Juan has a capital of $530,000, if he invests a certain amount at 2% and another amount at 5%, for the two investments he obtains $16,300. How much did you invest at each interest rate?
General
10 months ago
Let A={1,2,3,4} and let R be the relation in A defined by “x divides y”, written x|y. Write R as a set of ordered pairs
General
10 months ago
multiplying all natural numbers from 1 to 2023 what will be the last three digits of the result
General
10 months ago
The approximate distance between Santiago and Puerto Montt is 1,025 kilometers. If Pedro has covered 3/5 of that journey. How many kilometers do you have left to get there?
General
10 months ago
Assuming that the distribution of serum cholesterol level in men is Normal with mean 242.2 and standard deviation 45.4, calculate the proportion of men with serum cholesterol levels in the interval 187.7 to 328.5.
General
10 months ago
2-5x(y^2+2)+(x+3)(y^2+2)
General
10 months ago
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