A clever octopus swims 8 1/4km at a speed of 0.5 km/h. How long does the octopus
take to swim this distance in hours and
minutes

33 hours or equivalently: 1980 minutes

Explanation:

Use the formula for movement under constant velocity, as the velocity equal the distance traveled divided by the time it took, and solve for the unknown time (t):

which can also be given in minutes as : 33 x 60 = 1980 minutes

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;