C.
3 degree of temperature is decreased every hour.
so total temperature difference in one hour is -3
and in 7 hours, the difference is 7 * -3
Answer:
To get the reciprocal of a fraction, just turn it upside down. Like this: 3. 4. A Fraction ... Convert it to an improper fraction: 213 = 6 3 + 1 3 = 7 3 2.
Step-by-step explanation:
The leading term is 18, since the term on the right can be simplifies to 18(2x+1)(2-2x). 18 is the first term in the sequence.
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ANSWER
E. 10 and 640
EXPLANATION
The given series is

To find the first term of the series we substitute i=1 to get,


For the last term of the series, we substitute i=4 to obtain,


This implies that,

Therefore the correct answer is E