If the vectors u = and v=<2,-3>are orthogonal .Find the value of a a) 4
b)2
c)-9
d)9

The average human heart beats 72 beats per minute. how many times does it beat in 15 seconds?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?