The economic dynamism, which is the index of productive growth in dollars for countries that are designated by the world bank as middle-income are in table #7. 3. 8 ("socr data 2008," 2013). Countries that are considered high-income have a mean economic dynamism of 60. 29. Do the data show that the mean economic dynamism of middle-income countries is less than the mean for high-income countries? test at the 5% level.

The different forms of a gene for a given trait are called .

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.

The equation 24x2+25x−47ax−2=−8x−3−53ax−2 is true for all values of x≠2a, where a is a constant. what is the value of a? a) -16b) -3c) 3d) 16