# (Originais Teachy 2023) - Question Medium of Math

An architect is designing a staircase and to calculate the height h of each step, he uses the function h(x) = -x² + 4x, where x represents the width of the step in centimeters. Considering that the width of a step must be at least 0 cm and at most 4 cm, what is the maximum domain of x for this function?a.

[0, 4]b.

[0, 2]c.

(0, 4)d.

[0, 8]e.

(0, 4]Answer:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur id consequat justo. Cras pellentesque urna ante, eget gravida quam pretium ut. Praesent aliquam nibh faucibus ligula placerat, eget pulvinar velit gravida. Nam sollicitudin pretium elit a feugiat. Vestibulum pharetra, sem quis tempor volutpat, magna diam tincidunt enim, in ullamcorper tellus nibh vitae turpis. In egestas convallis ultrices. Sed non sem ultricies, sollicitudin sem facilisis, commodo justo. Maecenas mattis sodales nunc, et auctor massa fermentum a. Maecenas eget nisl felis.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur id consequat justo. Cras pellentesque urna ante, eget gravida quam pretium ut. Praesent aliquam nibh faucibus ligula placerat, eget pulvinar velit gravida. Nam sollicitudin pretium elit a feugiat. Vestibulum pharetra, sem quis tempor volutpat, magna diam tincidunt enim, in ullamcorper tellus nibh vitae turpis. In egestas convallis ultrices.

Answer key available only for registered teachers.

Register at Teachy and get access now!

Teachy originals