13. which best summarizes the change in number and size of microcontinents during the proterozoic?
a. the number of microcontinents increased and the size increased
b. the number of microcontinents increased and the size decreased
c. the number of microcontinents decreased and the size increased
d. the number of microcontinents decreased and the size decreased

Option C

The number of microcontinents decreased and the size increased

Explanation:

During the Proterozoic stage, it's expected that while the size of microcontinents increased, the reverse happens on the number to imply the number decreased. Therefore, option C is correct, the number of microcontinents decreased and the size increased

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

b

step-by-step explanation: a third of 24 is 8, 8 times 3 is 24 so 8 - 2 would be 6