For this case, we use the strategy of friendly numbers when subtraction is something complex to do mentally.
Let's suppose that we have the following subtraction:
Using friendly numbers we have:
Then, applying the associative property we have:
Doing the calculations we have:
Finally we have:
9514 1404 393
Answer:
Step-by-step explanation:
A) Your scientific or graphing calculator can tell you the product:
(3.9×10^33 erg/s)(1.55×10^7 s) = 6.045×10^40 ergs
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B) 10^2 mm is 100 mm, about 4 inches, so 1.8×10^2 mm is about 7 inches. This is somewhat larger than the diameter of a human hair (and about the same size as the diameter of a human head).
1.8×10^-2 mm = 18 μm is a more reasonable estimate of hair diameter
(The range of hair diameters is reportedly about 17 to 181 μm, so the given dimension is on the low end.)
The required Santa cane sees up to 150 children in 6 hours.
In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
Santa can see up to 25 children per hour,
Now,
The number of children that Santa can see in 6 hours is given as,
= 25 × 6
= 150 children
Thus, the required Santa cane sees up to 150 children in 6 hours.
Learn more about arithmetic here:
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Answer:
(-2, 12)
Step-by-step explanation: