Quarters are currently minted with weights normally distributed and having a standard deviation of 0.067. new equipment is being tested in an attempt to improve quality by reducing variation. a simple random sample of 20 quarters is obtained from those manufactured with the new equipment, and this sample has a standard deviation of 0.042. use a 0.05 significance level to test the claim that quarters manufactured with the new equipment have weights with a standard deviation less than 0.067. does the new equipment appear to be effective in reducing the variation of weights?

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

probably the last option

step-by-step explanation:

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0

the answer is 54 sq. ft. i just did this question, on odyssey ware, and it was right. make brainliest.