Abullet shot straight up returns to its starting point in 10 s. what is the initial speed of the bullet, assuming negligible air resistance?

wavelength divides in half and speed stays the same.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles