Jamie used a microscope to measure the diameter of a hair. she found that the diameter of
the hair was 0.72 meter. how is this number written in scientific notation?
a 7.2 × 10^-5
b 7.2 × 10^6
c 7.2 × 10^5
d 7.2 × 10^-6

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

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?