Which of the following is the same as 8.4 × 102 ? a. 840 b. 84 c. 8,400 d. .84
2 answers:
Answer: The correct option is (a). 840.
Step-by-step explanation: We are given to select the number that is equivalent to the following decimal number :
We know that
10 to the power positive number n means there are n zeroes after the digit 1.
Therefore, for the given decimal number, we get
Thus, the required same number is 840.
Option (a) is CORRECT.
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Answer:
skew
skew
parallel
parallel
Step-by-step explanation:
First see the below figure to understand parallel and skew lines
As you can see parallel lines lie on the same plane
skew lines lie on different plane and do not intersect
1)AB and GF
AB lies on ABCD plane
GF lies on EFGH plane
and they will never meet / intersect
so skew
2)DH and BF
DH lies on ADHE plane
BF lies on BCGF plane
they seem parallel but they are on different plane, so skew
3)EF and HG
EF and HG both lie on the same plane EFGH
and they both are parallel
4)for this see the second picture
both these planes are parallel
Hope this helps!
Answer:
D
Step-by-step explanation:
The formula for the circumference of a circle is 2r. So if we know that C=60
then we can trace our steps back. We are given that pi remains constant so we are left with the 2r from the formula and a 60. 60/2 =30.
The radius is 30cm