What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

100,000 * 1/100,000 would be 100,000/100,000 = 1 
Using the standard method you would take any number except for 0 and multiply it by 10 to a power, that power being the number of zeros following said number or how many places the decimal point would have to be moved from 0. 
Examples: 
100 = 10^2 
0.05 = 5*10^-2 
10 = 10^1 

All that said, the answer to your problem, as explained above, is 1 which is 10^0 written in the standard method

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )