For problems such as this, it can be handy to remember that
.. 1/(1/a +1/b) = ab/(a +b)
The time required to do a job is the inverse of the rate at which the job is done. Rates are added when people work together (in math problems, not in real life).
(2:44)*(3:14)/(2:44 +3:14) = 1:28:52.3
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2:44 = 41/15 hours = 82/30 hours
3:14 = 97/30 hours
Using the formula above, we have a "working together" time of
.. (82/30)*(97/30)/(82/30 +97/30) = 82*97/(30*179) = 3977/2685 . . . hours
.. = 1 hour 28 156/179 minutes
.. = 1 hour 28 minutes 52 52/179 seconds
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Learn to use the fraction functions on your calculator. They can be very helpful.
Answer:
1) Option 3
2) Option 1
3) Option 2
Step-by-step explanation:
To find : Match each number in scientific notation with the number written in standard form and in a step by step process.
Solution :
From scientific to standard we expand the power of 10.
1) 
Remove decimal and open the power,
Therefore, 
Match with Option 3.
2) 
Remove decimal and open the power,
Therefore, 
Match with Option 1.
3) 
Remove decimal and open the power,
Therefore, 
Match with Option 2.
Answer:
the excel that would be used to construct a confident interval estimate is (A) NORM.S.INV
Step-by-step explanation:
NORM>S>INV returns the of the standard normal cumulative distribution.
It is 14 because 8= 6to-2 and 3to-3is 6 so both together is 14
hope this helps
Answer:
0 (zero)
Step-by-step explanation:
Plug in the variable for -4 and solve
y= 2(-4)2-4(-4)
y= -8(2)-4(-4)
y=-16+16
y=0
