A)a closed tin of milk has diameter 10cm and height 16cm. find the total surface area of the tin, pi=3.14
b)given that v=pi r²h, make r the subject of the fomula
c) using the result from b above ,find the value of r when v =81 cm³,pi=4 and h=9cm

In what form is the following linear equation written y=9x+2

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)