Answer:
Step-by-step explanation:
You first need to find the surface area of a completely open cylinder. That formula is
Using 3.14 for π, we find the area of the material that is needed to make this pipe:
SA = 2(3.14)(1)(30)
SA = 188.49 square feet.
If it costs $3.50 per square foot and you have 188.9 square feet, we multiply the cost per square foot times the number of square feet:
188.49(3.50) = $659.40, choice B.
the picture in the attached figure
we know that
if ABC is an isosceles triangle
then
AB=BC
angle A=angle C=45 degrees
and
triangle ABD and triangle BDC also are isosceles triangles
AD=BD=x
DC=BD=x
the hypotenuse AC is equal to
To find the length AB applying the Pythagorean Theorem
remember that AB=BC
therefore
the answer is
the length of one leg of the large right triangle in terms of x is equal to
