Anyone know this i need it ASAP

$3.81

Step-by-step explanation:

The sales tax rate is 7.25%.

Cost of messenger bag = $52.50

Kevin will pay sales tax = 7.25% of 52.50

                                     =

                                     = 0.0725 × 52.50

                                     = $3.80625 ≈ $3.81

Kevin will pay $3.81 sales tax on messenger bag.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204