In circle a shown below, marc bc is 71° and marc ef is 78°: points b, c, e, f lie on circle
a. lines be and cf pass through point d creating angle edf. measure of arc bc is 71 degrees and measure of arc ef is 78 degrees. what is m∠fde?

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.