Answer:
wsp?
Step-by-step explanation:
9x^2 + 6x
4 dollars flat $4.00
Step-by-step explanation:
1.25x4= 5$ 5$+5$=10$
Answer:
$204.98
Step-by-step explanation:
Step 1: Add both item cost
Step 2: Find the sales tax of the result
- Step 1: Convert 8% to fraction
- Simplify
- Step 2: Convert 189.80 to a fraction
- Step 3: Set it up
- Step 4: Cross divide
- Step 5: Multiply the result
Step 3: Add the result from the total cost of both items
The total cost of the hats and boots including sales tax is 204.98 dollars
Answer:
7
Step-by-step explanation:
This is a Poisson distribution problem with the formula;
P(x;μ) = (e^(-μ)) × (μ^(x))/x!
We are told that the grocer sells three of a certain article per week. Thus;
μ = 3
Now, we want to find out How many of these should he have in stock so that the chance of his running out within a week is less than 0.01.
This means;
P(X > k) < 0.01
This can be rewritten as;
P(X ≤ k) < 0.99
Let's try x = 8
P(8;3) = (e^(-3)) × (3^(8))/8!
P(8;3) = 0.008
But; P(X ≤ 8) = 1 - 0.008 = 0.992
This is more than 0.99 and thus is not the answer
Let's try x = 7
P(7;3) = (e^(-3)) × (3^(7))/7!
P(7;3) = 0.022
But; P(X ≤ 7) = 1 - 0.022 = 0.978
Thus is less than 0.99.
Thus, stock should be 7
