When a photograph is taken, the exposure time, t is directly proportional to the square of the size, f , of the opening in the camera lens. t = 0.02 when f = 8. it can be shown that t = 1/3200 f squared. calculate the value of f when t = 0.0098

180

step-by-step explanation:

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.

it is not that hard all u have to do is plot the graph

step-by-step explanation: