20. The figure below shows a warehouse in the form of a prism with its cross section comprising of a rectangle and a triangle. The length of the warehouse is 70m and its width is 12m. The triangle has sides
of length 8m by 12m by om and the rectangle is om in height.
Calculate
al The height of Q above BC.
(4 marks

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

Acone with volume 1350 m³ is dilated by a scale factor of 1/3. what is the volume of the resulting cone? enter your answer in the box. m³