What is the product of 1.0 x 102 and 1.8 x 103 expressed in scientific notation?

What is the slope of the line shown below?

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?

Find the value of the variable and the length of each chord for #5 and #6.