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an open rectangular tank of length 32 cm and breadth 28 cm contains water to a depth of 19 cm. 2580 circular metal discs of diameter 23mm and height 4 mm are dropped into the tank. find ;

1. the new height of water in the tank,

2. the surface area of the tank that is in contact with the water after the discs have been added.

step-by-step explanation:

this is not a question

1010: 3030

is it i think

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %