Use the definition of conditional probability to find the "and" probability:

Use the inclusion/exclusion principle to find the "or" probability:

Answer:
14 packs per hour
Step-by-step explanation:
The store sold 57 - 15 = 42 packs of toilet paper in 3 hours.
42 packs in 3 hours = 42/3 = 14 packs per hour
I SAY IT THE SECOND OPTION
Answer:
The answer is -x
Step-by-step explanation:
(x+3)(x-4)
x²-4x+3x-12
x²-x-12
It's a half circle plus a triangle.
The diameter of the circle is 23.1 ft so the radius is 11.55
Area of a circle is πr²
Area of a triangle is (1/2)bh
Area shape = (1/2)πr² (1/2)bh
A = (1/2)π(11.55)² + (1/2)(23.1)(29.4)
A = 549.1181