An earthquake strikes and an isolated area is without food or water. three crews arrive. one can dispense needed supplies in 4545 hours, a second in 9090 hours, and a third in 6060 hours. how long will it take all three crews working together to dispense food and water?

If we say 1515 is one part, A is doing 3, B is doing 6, C is doing 4. We have 13 parts in total, so we divide them proportionally:

Xb+2xa+1.6xc=13

A= 5.65 parts

B= 2.82 parts

C= 4.52 parts

B would take 9090 to do 13

But will do T To do 2.82

T= 1,971.8 hours

Hope you get it!

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

ii6tyhj7 juj3yyj333ju jmyhthhtk7h jg hajj jiijh