A laptop has a listed price of $816.98 before tax. If the sales tax rate is 9.75%, find the total cost of the laptop with sales
2 answers:
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has critical points wherever the partial derivatives vanish:
Then
- If
, then
; critical point at (0, 0)
- If
, then
; critical point at (1, 1)
- If
, then
; critical point at (-1, -1)
has Hessian matrix
with determinant
- At (0, 0), the Hessian determinant is -16, which indicates a saddle point.
- At (1, 1), the determinant is 128, and
, which indicates a local minimum.
- At (-1, -1), the determinant is again 128, and
, which indicates another local minimum.
Answer: Yana has 8 bathing suits.
Step-by-step explanation: Given that the ratio of Dina’s bathing suits to Yana’s bathing suits was 4 : 1 and Dina has 24 more bathing suits than Yana.
We are to find the number of bathing suits that Yana has.
Let 4x and x represents the number of bathing suits that Dina and Yana have respectively.
Then, according to the given information, we have
Therefore, the number of bathing suits that Yana has is given by
Thus, Yana has 8 bathing suits.