Ablock of wood has a mass of 180 grams it is 10.0cm long , 6.0cm wide and 4.0cm thick what is the volume and density

Iknow #2 is d. i just need to know why

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.