The thermocline is the name for the layer of the ocean where the temperature drops with depth faster than in other layers, True.
Truman uses “democracy” more than Eisenhower
When the movies were $2.95 a month, she rented 10, meaning she spent $29.50 (2.95 * 10)
She then rented two fewer movies, meaning she rented 10-2 which equals 8, and spent $27.60 (3.45 * 8)
She then cut the number of movies rented in half 8/2 which equals 4, and spent $17.80 (4.45 * 4)
So she now rents 4 movies per month, and spends $17.80
Hope this helps!