Question 7 of 25 URGENT! PLEASE ANSWER

Which of these changes
produces a chemical change?
A. A large rock is crushed into gravel.
B. Lava cools and changes from a thick fluid to solid rock.
C. A stone fizzes and forms a gas when acid is dropped on it.
D. Limestone slowly dissolves in water and forms a cave.

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Josie buys a pair of boots that retail for $52.00 dollars, however they are currently on sale for 25% off how much does josie pay for the boots if there is also a 6% sales tax on them

Multiply and simplify 2x^2 y^3 z^2 · 4xy^4 x^2