This question is for my Child Development class:

Ability to understand that an object stays the same from one time to the next-

Thank u,
Laurencurnutte20

Willing to give brainliest + free points answer quickly a tire without good traction has less a. grip on the road b. grip on the axle c. air in it d. risk of exploding

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.

How do astronomers measure the amount of dark matter in the universe