Reflection Questions 1. How long (in centimeters and years) was the Precambrian period compared to the rest of the scale?

2. How many years and “centimeters” of time separated the dinosaurs and humans on Earth?

3. How many years and centimeters of time passed before life appeared on Earth?

4. For how many years of geologic time have humans existed?

5. Did dinosaurs exist at the same time as mammals? Explain your answer using the geologic time scale.

Which barrier to economic development is shown in the following examples?

Question 51 ptssolve. assume the exercise describes a linear relationship.marty's tee shirt & jacket company is to produce a new line of jackets with a embroidery of atpvtenpoeyiliceorsuit ut itoare fixed costs of $59 u to set ud for production, andvariable costs of $39 per jacket. write an equation that can be used to determine the total costencountered by marty's company in producing x jackets. use the equation to find the total cost ofproducing 50 jackets.$2520s2532o $2540s2552

What has been a consequence of human economic development in advancing nations? a) subsistenceb) conservationc) photosynthesisd) pollution