800 = ( 200 - s ) × t1 ;
800 = ( 200 + s ) × t2 ;
t1 + t2 = 8h 20 mins.;
where s = the average speed of the wind ;
t1 = the time into the wind ;
t2 = the time with the wind ;
Then, t1 = 800 / ( 200 - s ) and t2 = 800 / ( 200 + s ) ;
800 / ( 200 - s ) + 800 / ( 200 + s ) = 8h and 20 mins. = 500 mins. ;
8 / ( 200 - s ) + 8 / ( 200 + s ) = 5 ;
8( 200 + s ) + 8( 200 - s ) = 5( 200 + s )( 200 - s ) ;
1600 + 8s + 1600 - 8s = 5( 4000 - s^2 ) ;
3200 = 20000 - 5s^2 ;
5s^2 = 17800 ;
s^2 = 17800 ÷ 5 ;
s^2 = 3560 ;
s =
![\sqrt{3560} = 59,66 miles per hour](https://tex.z-dn.net/?f=%20%5Csqrt%7B3560%7D%20%3D%2059%2C66%20miles%20per%20hour%20)
≈ 60 miles per hour ;
Answer:
juan
Step-by-step explanation:
juan won causs he got to 4 meters in 13 mins whereas Antonio did it in 15 mins
for the second part just describe how the differences between the line such as Antonio starts off really fast but slows down
juan starts off at a slow pace behind Antonio but gradually catches up and overtakes him as Antonio stops for a rest for 2 mins
Answer:
9
Step-by-step explanation:
All u have to do is think only about two denominators, 9 and 3
And then memorize the multiplication of any number out of these two, until u get a number which is divisible by the other number. Its like,
9×1= 9
i
is it divisible by 3?
9/3= 3
Oh yes, it is divisible by 3 with no remainings. So that is the least common denominator
<span>4 cm / 1 year x 10 mm / 1 cm x 1 year / 365 days </span>
Your answer would be B.
Hope this helps.