9)

The

revenue function

for

a

given

firm

is

R(x)

=

339x7.

How fast

is

the revenue

changing

at

a

production

level

of x:5.

7x-T

l0) Five

thousand

dollars

is deposited

in

a bank

at3% interest

compounded

continuously,

Find

the

average

value of

the

money

over

the

first

5

years.

(nearest

doltar)

11)

Find

the

producers'

surplus

for

the

following

supply

curve: p

=

(3x-14)2

,

where

xo=B

and

po:I00.

(2

decimal places)

12)

Amanufacturer'smarginalprofitisTr':-5x2

+150x+l55.Findtheprofitneamedby

increasing production

from

three

trnits

to

five units.