Find the 61st term of the following arithmetic sentence
2 answers:
We know that :
nth term of a Arithmetic Sequence is given by : a + (n - 1)d
where : a is the first term
d is the common difference, which is given by difference between 2nd term and 1st term
Given Sequence : 15 , 23 , 31 , 39. . . . . .
We can notice that : a = 15
d = 2nd term - 1st term = (23 - 15) = 8
⇒ 61st term : 15 + (61 - 1)8
⇒ 15 + (60)8
⇒ 15 + 480
⇒ 495
⇒ 61st term of the given sequence is 495
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Answer:
B. 1.2 x
Step-by-step explanation:
Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8. Or, in this case it's the opposite since we have a negative number. Since it's a decimal it's multiplied by 10 still but the exponent is negative. All we need to do to find what the exponent would be in this case is to count the number of zeros before the "12." There are 4 zeros before the 12. So your exponent would be -4. Now all we need to do is write out "equation" per say.
1.2 x 10^-4
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