Step-by-step explanation:
10)We have to calculate the average speed if we know the distance and time that Johnatan can jog. The distance
distance=3 2/5 miles = 3.4 miles.
Time=7/8 hour = 0.875 h
Then we will use the formula for the average speed ( velocity )
velocity=distance/time. v = 3.4 m / 0.875 h = 3.866 mph
so therefore The average speed is 3.866 mph.
11)
divide 120 / 7/4 (remember 120 = 120/1)
Which means you have to cross multiply (an important part on fraction division, that is, your division would be 120x4 / 1x7).
Then 120x4= 480
And 1x7 = 7
Then you get 480/7, which is the same as 68 4/7 mph
12)8 1/3=25/3
25/3 pages of a book in 10 minutes
Multiply both numbers by the reciprocal of 10, which is 1/10
25/3 x 1/10=25/30=5/6
10 x 1/10=1
So, Charlotte reads 5/6 pages of a book in 1 minute.
13)45 1/2% = 45.5% = 45.5/100 = 91/200
30 1/4% = 30.25% = 30.25/100 = 121/400
75 1/3% = 75.3333...% = 75.333.../100 = 11/15
