Are the decimals 0.4 and 0.40 equal? explain.

Yes they are the same value because the 4 is in the tenths place in bother decimals. 0.4 is just a shortened way of writing 0.40. 

They are both equal since 0.4 is just 0.40 without a 0 because you can add as many 0 at the end of a decimal but it still won't matter. For example 0.5000 would just be 0.5 because those 0 don't mater. if the 0 is in the middle of a decimal like 0.709 than the 0 between the 7 and 9 would matter because there is a number after it

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 )