6. Calculate the 90% confidence interval for the difference of the average number of fireflies caught in a 15-minute interval before 9pm and the average number of fireflies caught in a 15-minutes interval after 9pm. Show your work!

This question consists of 2 parts, a and b. marco got a quotient of 70 when he divided 49 by 0.07. part a what is the correct answer to this problem? part b what mistake did marco make? you!

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?