Find the value of the tangent for a

answer:

a

step-by-step explanation:

we require to find ac using pythagoras' identity

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides, thus

ac² + 12² = 40²

ac² + 144 = 1600 ( subtract 144 from both sides )

ac² = 1456 ( take the square root of both sides )

ac = = = 4

tan a = = =

= × = → a

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers