Managers at Matthew's Sporting Goods are concerned that the dumbbells from one of the store's new suppliers are poorly made. To investigate, the managers used a precision scale to weigh a random sample of 50 weights labeled "30 kg." They found that the dumbbells in the sample weighed an average of 30.1 kilograms, with a standard deviation of 3 kilograms. Find a 90% confidence interval for the mean weight of "30 kg" dumbbells manufactured by the new supplier.
Round your answers to the nearest tenth.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

answer: what in the world is this

step-by-step explanation:

the answer is 8/21

hope this