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
Answer:
48
Step-by-step explanation:
A square has 4 sides of equal length. 12 x 4=48
A I think it’s A llllleeeeettt go
Yup, the amount of 0's is the exponent. for example 1000= 10^3, hope this helped :)
You just add the values for volunteers that worked 16-20 hours and 21-25 hours which would be 50 + 10 = 60. So the total number of volunteers that workers more than 15 hours is 60.