In an experiment involving high temperature performance of two types of transistors, a sample of 60 transistors of type a were tested and were found to have a mean lifetime of 1437 hours and a standard deviation of 183 hours. a sample of 180 resistors of type b were tested and were found to have a mean lifetime of 1356 hours and a standard deviation of 244 hours. can you conclude that the mean lifetimes differ between the two types of transistors?

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true