(on geometry )

19. in δdef, if δde ≅ δdf is the hypotenuse, then δdef is

a. acute and scalene.
b. right and scalene.
c. right and isosceles
d. obtuse and isosceles

20. the measure of two angles of a triangle are 38° and 47° what type of triangle is this ?

a. acute
b. obtuse
c. right
b. equiangular

21. if δigh ≅ δklj, then ∠h is congruent to

a. ∠k
b. ∠l
c. ∠j
d. ∠g

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.