The speed of a river boat is 40km/h and the rate of the flow of the river is 80km/h. Moving along the same direction as the flow of the river, the boat moved at 240km/h. Calculate the distance the boat could travel going against the stream in the same time period. A- 140 km
B- 120 km
C- 160 km
D- 180 km

i understand 100% 10/10 hit or miss?

step-by-step explanation:

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step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

5 + 8 +7 + 4 + 0 +1 = 25

step-by-step explanation: