Find the product.  Write the answer in standard form. 6-3i2{“version”:”1.1″,”math”:”6-3i2″}

38) Over the course of evolutionary time, animal body sizes have gotten larger, yet cell sizes have not. Cells have stayed proportionally the same size to remain efficient, because A) if cells got larger, the demand for energy and raw materials would greatly decrease B) larger cells would become limited by the ability to move materials across the plasma membrane C) of limitations of the composition of the plasma membrane D) of the inability of the nucleus to produce sufficient DNA for larger cells

Find the quotient.  Write the answer in standard form. 9+2i2-4i{“version”:”1.1″,”math”:”9+2i2-4i”}

Solve the equation by the square root property. x+182=25{“version”:”1.1″,”math”:”x+182=25″}

23) Which one of the following statements CORRECTLY describes the relationship between an atom and an element? A) An element is the fundamental unit of an atom. B) An element is composed of atoms that are joined together by ionic and covalent bonds. C) An atom is composed of different elements that are joined together by ionic and covalent bonds. D) An atom is the smallest unit of an element that demonstrates all of the properties of that element.

28) Which one of the following is TRUE regarding electrons, shells, and energy? A) Electrons are located in shells around the nucleus. B) Electrons are attracted to each other because they have the same charge. C) In order for an electron to move closer to the nucleus, it must absorb energy. D) The innermost electron shell has the most potential energy.

Solve the problem. A ladder is resting against a wall.  The top of the ladder touches the wall at a height of 9 ft.  Find the length of the ladder if the length is 3 ft more than its distance from the wall.

What will the price of a ton of rice be in the long run? 

34) Most eukaryotic cells have a membrane-bound ________ that contains the genetic material. A) nucleus B) cytoplasm C) lysosome D) plasma membrane

Solve the problem. Martha can rake the leaves in her yard in 4 hours.  Her brother can do the job in 2 hours.  How long will it take them to do the job working together?