On July 5*2019, two earthquakes struck Trona, California. The largest one was 7.1 on the Richter Scale. It took 123.6 sec for this earthquake to be felt in Long Beach, 192 miles away. (1mile = 1609.3meters).
a) What was the velocity (v) of the earthquake waves? (2500m/s)
b) If the frequency (f) of the wave was 15Hz, what was the wavelength(A) of this seismic wave? (167m)
c) What was the time for one wave to pass, the period (T)? (0.67sec)

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

Write the pair of fractions as a pair of fractions with a common denominator

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem