Sleep cycles repeat about every minutes, and the typical adult has cycles per night
a. 60; six to seven
b. 60; three to four c. 90; four to five
d. 120; two to three e. 90; two to three
c
Psychology
a. 60; six to seven
b. 60; three to four c. 90; four to five
d. 120; two to three e. 90; two to three
c