Measuring the universe what would be the best method for a scientist to use in order to obtain a precise measurement of star's distance from earth? triangulation method blueshift method redshift method radial method

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

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000