An atom represented by X has

Submit as Question 15 on Crowdmark I want to enclose a rectangular garden that is feet by feet and has area . I will use wooden fencing on three side and metal fencing on one side, as shown in the figure below. The wooden fencing costs per foot, and the metal fencing costs per foot. For all parts, make sure to clearly label your final answers so that they are easy to find on the page. You do not need to simplify your answers. (A) Write an expression for the total cost, , in terms of and .   (B) Rewrite the cost in terms of only , and find the domain of .   (C) Find the dimensions, and , of the garden with the lowest cost. Justify that this gives the absolute minimum cost using the first derivative test or the second derivative test.

Which of the following pairs of subatomic particles have charges of equal magnitude but opposite in sign?

What are the numbers of protons, neutrons, and electrons in F-19?

In SPRCA testing, the endpoint of an antibody screen is detected as:

In which of the following compounds does one molecule of the compound contain 3 elements and 8 atoms?

Given the electronegativities below, which of the following covalent single bonds is the most polar? Element: H C N O Electronegativity 2.1 2.5 3.0 3.5

Which of the following are characteristics of polymorphic and metamorphic viruses? (Select all that apply)

Which of the following ions does not have 18 electrons?

The notation Y3− denotes a Y atom that has ________.