As an engineer working for a electrical power company you need to design an experiment to determine a 95% con dence interval for the mean daily power usage for homes in Salt Lake City. Measuring the daily power usage of every single home is not practical; therefore you need to choose a sample. What size does your sample need to be to ensure that the con dence interval for is not larger than 5kWh

c. 4 1/4 pounds

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.

d. vertex

step-by-step explanation: