bugbug26

13.03.2022 • 

Mathematics

3 taps x,y and z can fill a tank in 40 hours, 15 hours and 20 hours respectively. the three taps are turned on at 8.00a.m when the tank is empty for five hours then z is turned off. after two hours tap y is turned off. work out ;- the proportion of water in the tank after seven hours
the proportion of water in the tank after seven hours
the time the tank will be completely full

Ответ:

lesliemar

08.12.2021

Mathematics

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10 (-61 + 102 i)

(3 + 4 i)^2 (2 + 4 i) (7 - 8 i)  

Step-by-step explanation:

(3 + 4 i)^2 (2 + 4 i) (7 - 8 i)

10 (-61 + 102 i)

r = 50 sqrt(565) (radio), θ = π - tan^(-1)(102/61) (ángulo)

50 sqrt(565) (cos(π - tan^(-1)(102/61))+i sin(π - tan^(-1)(102/61)))

50 sqrt(565) e^(i (π - tan^(-1)(102/61)))

x^2 + 1220 x + 1412500

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