He lifts for 11 more minuets each day.
51 + 11 = 62
He lifted for 62 minuets on Friday.
62 + 11 = 73
He lifted for 73 minuets on Saturday.
Answer:
.009 miles/hour
Step-by-step explanation:

This is the method you should take with unit conversions in general, just set up fractions so the units cancel out, like the 7.5 feet cancels out with the feet in the 1/5280 so miles is left on top.
Answer:
There would be 473 turnips.
Step-by-step explanation:
Answer:
Option D
Step-by-step explanation:
Given: set of inequalities
To find: Points which do not satisfy all the inequalities
Solution:
For point
:

So, (15, 0) satisfies all the inequalities
For point
:

So, (7.5, 7.5) satisfies all the inequalities
For point (22.5,2.5):

So, (22.5,2.5) satisfies all the inequalities
For point (7.5 ,0):
Put s = 7.5 and t = 0 in 
which is false
So, 
1/5x1/2=1/10
1/5 because there are 5 flavors.
1/2 because there are 2 kinds of pies.
So the answer is 1/10.
Hope this helps.