A red kangaroo jumps along at 40 km/h. At this rate how long would it take to jump 2 km?
1 answer:
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For the first one:
The radian of 60º is 1.047. you just have to find one that has the same value, which would be /3. (the last choice).
for the second one:
you do it the other way. The answer is 45 degrees.
The set is the set of all values of
that are solutions to the given equation. So all you need to do is check whether
and
satisfy the equation.
The equation holds, so both 1 and 2 are solutions, and hence is a subset of the solutions.