When baking soda and vinegar are mixed together bubbles form and the vinegar and baking soda are changed into new chemicals. this is an example of-
a) a physical change
b) a chemical change

b. a chemical change

Explanation: it says it in the question that "vinegar and baking soda are changed into new chemicals" so you know that it's a chemical change

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2