At the surface of the ocean, the water pressure is the same as the air pressure above the water, about 15lb/in2, below the surface the water pressure increases by about 3.64lb/in2 for every 10 ft of descent. write a function f(x) which expresses the water pressure in pounds per square inch as a function of the depth in inches below the ocean surface.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

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