Okay I can’t see the pic…
Answer:
a)
i.the lower limit of the sum
: n=1
ii.the upper limit of the sum
: n=18
iii.the explicit formula of the sum
:
b) 1,125 beads
Step-by-step explanation:
a) The number of beads per row of Dante's necklace is given by the series:
3 + 10 + 17 + 24 + ...
The first term of this series is .
There is a constant difference of .
To write this series in summation notation, we need to determine the explicit formula which is given by:
We plug in the values to get:
The summation notation is given by:
b) The total number of beads in the necklace is given by the sum of the first 18 terms of the sequence.
This is given by
We substitute the values to obtain:
Therefore the total number of beads is 1125
Answer:
25t = 65
Step-by-step explanation:
Given that :
Profit earned = $60
Charge per hour = $25
Randy's cost or expenses = $(2 + 3) = $5 per job
Profit = (charge per hour * t) - cost
Where t = time
$60 = ($25 * t) - $5
$60 = $25t - $5
$25t = $65