Speed.
In equation form, speed is:
v+=+d%2Ft
if the time when airplane travels with the wind is t1 and the time when airplane travels against the wind is t2, we are given that t1=t2...we will use t
so, if it travels 3699 miles with the wind and has a speed of 380+mph, we have
380+mph+=+3699m%2Ft ....now calculate the time t
380+mph+%2At=+3699m
+t=+3699m%2F380+mph
+t=+3699cross%28m%29%2F380cross%28m%2Fh%29
+t=+%283699%2F380%29h
+t=+9.7h.....now we know the time and we can plug it in formula for speed against wind where d=3141m using same time
v+=+3141m%2F9.7h
highlight%28v+=+323.8mph%29 .........your answer
Answer:
20+10+4+6
Step-by-step explanation:
Hope this helps :)
Answer:
D
Step-by-step explanation:
![\bf 1~~,~~\stackrel{-3\cdot 1}{-3}~~,~~\stackrel{-3\cdot -3}{9}~~,~~\stackrel{-3\cdot 9}{-27}~~,~~\stackrel{-3\cdot -27}{81}](https://tex.z-dn.net/?f=%5Cbf%201~~%2C~~%5Cstackrel%7B-3%5Ccdot%201%7D%7B-3%7D~~%2C~~%5Cstackrel%7B-3%5Ccdot%20-3%7D%7B9%7D~~%2C~~%5Cstackrel%7B-3%5Ccdot%209%7D%7B-27%7D~~%2C~~%5Cstackrel%7B-3%5Ccdot%20-27%7D%7B81%7D)
notice, the "common ratio" is -3, thus their sum is just
1 + (-3) + 9 + (-27) + 81.
To do that is by the number 12 and is 12. and the 5 tenth is . 5 then put them together equals 12.5