I don’t understand and it’s a quiz grade

Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water whichstatement best describes the correct plan for her procedure? the density and the amount of water are controls, and the amount of salt and the type of salt are variablesthe amount of water and the amount of salt are controls, and the type of salt and the density are variablesthe type of salt and the amount of water are controls, and the amount of salt and the density are variablesthe type of salt and the density of water are controls, and the amount of salt and the amount of water are variableso

"in english, write six to eight sentences comparing cultural aspects of greetings in spanish-speaking countries with greetings in your own culture. use what you learned in the lessons to tell about three differences and three similarities. discuss non-verbal greetings and how respect is shown. you may also include verbal greetings, but do not simply translate phrases from one language to another."

68. si tengo que lavar la ropa, estoy en a. el jardín b. la recamara c. el desván d. el lavadero 69. si tengo que cortar el pasto, estoy en b. la recamara c. la sala de estar d. el lavadero the table 70. si tengo que poner la mesa, estoy en a. la cocina b. el comedor c. la recamara d. la sala d. la sala 71. si tengo que preparar la cena, estoy en a la cocina b. el comedor c. la recamara d la sala