2. The following formula models the Richter scale which describes the magnitude, M, of an earthquake with amplitude A where k is a predetermined constant.
M = log
a. What is the base of the log in this formula?
(1 point)
b. Change this formula to exponential form.
(2 points)
c. Use the above information to explain why a 7.0 earthquake has ten times the amplitude of a 6.0
earthquake.
(2 points)
d. What would M be if A = k? What would that mean in real life?
(2 points)

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Read the excerpt from the strange case of dr jekyll and mr. hyde what do dr. jekyll's thoughts reveal about him in this excerpt? [t]he inmates of my house were locked in the most rigorous hours of slumber, and i determined, flushed as i was with hope and triumph, to venture in my new shape as far as to my bedroom. i crossed the yard, wherein the constellations looked down upon me, i could have thought, with wonder, the first creature of that sort that their unsleeping vigilance had yet disclosed to he is jealous of those who can sleep through the night. he is revered for his scientific advances. he is interested in studying the movements of the stars he is proud and enthusiastic about his initial results.