Annabelle bought three rings that each cost $7. If she paid for the rings with $40, how much change should she receive? A. $21
B. $33
C. $29
D. $19
Show work.
TRYING TO PROVE MY 3RD GRADE SISTER WRONG. She swore it was 21.

Which of the following points is collinear with (-2,1) and (0,3)

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

15/16 as a decimal rounded to the nearest hundredth