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Compare and contrast debris flows, mudflows, and lahars.

If a fault plane is less than 30° from horizontal and the hanging-wall block moves upward relative to the footwall block, the fault is a __________ fault.

lcm ( 12 , 15 ) {“version”:”1.1″,”math”:”\mathrm{lcm}(12, 15)”}

How many different ways are there for a diner to choose a main dish and a desert?

If 3 of the main dishes are spicy, 5 of the main dishes have meat, and 2 of the main dishes are both spicy and have meat, how many of the main dishes are either spicy or have meat?

a , f , d , b , d {“version”:”1.1″,”math”:”a, f, d, b, d”}

{ ( 1 , 2 ) , ( 2 , 3 ) , ( 1 , 3 ) } {“version”:”1.1″,”math”:”\{(1, 2), (2, 3), (1, 3)\}”}

e , b , d , a , c {“version”:”1.1″,”math”:”e, b, d, a, c”}

p → q {“version”:”1.1″,”math”:”p \to q”}

{ ( 1 , 1 ) , ( 1 , 3 ) , ( 2 , 2 ) , ( 3 , 1 ) , ( 3 , 3 ) } {“version”:”1.1″,”math”:”\{(1, 1), (1, 3), (2, 2), (3, 1), (3, 3)\}”}