Answer:
A camera is discounted by $7.50 off its original price and had a 15% markdown.
Let the original price be represented as x
The solution proceeds as follows:
=>
=> x = 8.82
The actual original price comes to $8.82.
A student used the equation:
15(7.5) = Original price
and calculated the camera's original price to be $112.50.
This calculation was incorrect. The student mistakenly calculated 15% of the selling price instead of the original price.
He should have calculated 15% of the original price to equal the selling price.
Answer:
Indeed, having 15 people recognize the brand would be considered unusual, as it lies beyond 2 standard deviations from the average.
Step-by-step explanation:
Examine the provided data.
The average recognition rate for the Yummy brand name among groups is 12.5, with a standard deviation of 0.58.
Mean = μ= 12.5
σ = 0.58
n = 15
Thus, having 15 people recognize the brand would indeed be unusual, as it is outside of the 2 standard deviations from the mean.
Answer:
Wyjaśnienie krok po kroku:
Załóżmy, że prostokąt ma wierzchołki (x,y,z) w dodatnim oktancie. Prostokątny pudełko musi być symetryczne względem wszystkich trzech osi.
Wtedy jego boki to
Objętość =
Maksymalizuj objętość przy założeniu
tj.
Użyj mnożników Lagrange'a, mamy
przy maksimum
Dzieląc otrzymujemy
Podobnie
Zatem otrzymujemy
Stąd wymiary to
(2x,2y,2z)
<pzatem wymiary="" to="">