A 150-pound person uses 4.8 calories per minute when walking at a speed of 4 mph. How long must a person walk at this speed to use at least 250 calories?

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?