Use a calculator to get your answer
<span>9 feet, 2 inches
First thing to do is determine how high above the ground Mumford's eyes are. The proportions for an adult human is that their height is about 7.5 heads tall (this includes the head), so Mumford's head is about (7*12)/7.5 = 11.2 inches tall. The eyes are about centered vertically on the head, so Mumford's eyes are about 5.6 inches from the top of his head. So his eyes are about 7*12 - 5.6 = 84 - 5.6 = 78.4 inches from the ground. Once Mumford backs up and is able to see the goal in the mirror, he's created 2 similar right triangles. One of the triangles is the distance from the mirror to Mumford and the height of Mumford's eyes from the ground. The other triangle is the distance from the mirror to directly underneath the goal and the height of the goal. They're similar triangles since the angle of incidence of a light ray matches the angle of reflection. So let's do the math. First, the 6 feet and 10 feet measurements are multiplied by 12 to convert to inches. So we have 72 inches and 120 inches. Let's set up the equation and solve:
72/78.4 = X/120
120*72/78.4 = X
110.2040816 = X
Let's round to the nearest inch giving 110 inches. And converting to feet and inches gives 9 feet, 2 inches.</span>
We have that
[the area of the trapezoid]=[area of rectangle]+2*[area of triangle]
[the area of the trapezoid]=[10*9]+2*[9*9/2]
[the area of the trapezoid]=[90]+2*[40.5]= 171 units²
see the attached figure
the answer is 171 units²
The answer is B because its 9 hundred and thousandths is the smallest place
Add similar elements: x+4x=5x
5x+4=0
Subtract 4 from both sides
5x+4-4=0-4
Simplify
5x=-4
Divide both sides by 5
5x/5 = -4/5
Simplify
X= -4/5
