Even though alexandra could talk with her friends during dance class, she couldn't sing along to the songs. which best describes her heart rate during this activity?

Maybe she was nervous about singing the songs or she couldn't remember the lyrics to the songs, her heart rate was probably fast because of the nervousness 

Bis the right answer

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.