Numbers may be entered in several formats - including scientific notation and numerical expressions. webassign uses standard scientific or "e" notation for "times 10 raised to the power." for example, 1e3 is the scientific notation for 1000.you cannot have a space in a number. you cannot substitute the letter o for zero or the letter l for 1.you cannot include the units in the number unless specifically asked for. you can include the sign + or - of the number. which of the entries below will be interpreted as numbers? (select all that apply.) 1.56e-9 3.25e4 2.54 m 1.56 e-9 1.9435 -4.99 1.23 inches

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.