The solution to a system of inequalities is
a.
a single point that satisfies all inequalities in the system
b.
a collection of points that satisfy all inequalities in the system
c.
a single point that satisfies at least one inequality in the system
d.
a collection of points that satisfy at least one inequality in the system

Option B is right.

Step-by-step explanation:

Whenever a system of inequalities is given, normally we will get a collection of points that satisfy all the inequalities in the system.

Option A is wrong because a single point cannot be a solution for all inequalities of a system. Normally an interval would be there.

Option B is right.

Option C is wrong since a single point has to satisfy at least one. There cannot be a solution for the full system unless it satisfies all inequalities.

Option D is wrong because satisfying at least one inequality is not sufficient, and satisfying all inequalities is a must.

1 1/4 hours

step-by-step explanation:

2/4 + 2/4 + 1/4 = 5/4 or 1 1/4

b. astronomers