Please answer i need it for a timed test 1.An escalator at a shopping mall is 10 m long and move at a constant speed of 0.5 m/s. If Jose steps onto the escalator at the bottom while it is moving, how long will it take him to travel the 10 m?

2. A student is measuring the speed at which a ball rolls down a ramp. Which unit of measurement is the student most likely using to describe the speed of the ball?

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

the answer to question 1 is -8, 28.

step-by-step explanation:

its line 2 i just added the rest or else it wouldn't let me answer