Answer:
Step-by-step explanation:
4 cups of tea per minute.......lunch lasts 2 hrs.....there are 120 minutes in 2 hrs...so in 2 hrs, there will be (4 * 120) = 480 cups
and if there is 16 cups in 1 gallon, the caterer needs to bring :
480 / 16 = 30 gallons <==
The dot product of the two vectors will be given as follows:
v*w=(-7i+4j)*(-6i+5j)
=(-7*(-6))i+(4*5)j
=-42i+20j
Hence the answer is:
v*w=(-42i+20j)
Step-by-step explanation:
Tha angle b is 57 degree !!
