The sum of 3.0478 and 4.92 is
, which have 5 significant digits.
<u>Step-by-step explanation:</u>
We have ,
and
. The significant digits of a number are digits that includes all digits except:
- All leading zeros. For example, "013" has two significant figures: 1 and 3;
- Trailing zeros when they are merely placeholders to indicate the scale of the number and ,
- Spurious digits introduced, for example, by calculations carried out to greater precision than that of the original data, or measurements reported to a greater precision than the equipment supports.
Here
and with significant digit rules
. Now, Sum of both numbers = 
⇒Sum of both numbers = 
⇒Sum of both numbers = 
∴ The sum of 3.0478 and 4.92 is
, which have 5 significant digits.
Answer:
C. In 2001, the temperature was 83°F.
Step-by-step explanation:
79 is 4 less than 83.
The temperature in 2001 was 83 °F.
Answer:
Below.
Step-by-step explanation:
[(x - 3)(x +3)] / [(x - 3)(x - 10)]
The x-3 cancels out.
Answer:
3/4
Step-by-step explanation:
Let the number = x
Nine times the number = 9x
Hence, 9x - 6 = x
9x - 6 = x
9x - x = 6
8x = 6
∴ x = 6/8 = 3/4