Multiply first formula by 2, then do formula 1-formula 2
The minimum electric rate in cents per kwh for which the 12-year total cost will be less for the first freezer is 8.61 cents
<h3>How to calculate the rate?</h3>
Let x = minimum electric rate (Cents/kWh)
Total months in 12 years is 12*12 = 144 m
1st freezer
Total cost over 12 years is
623.95 (cost) + (90 kWh/m)*(144 m)(x/100 $/kWh)
= 623.95 + 129.6x
2nd freezer
Total cost over 12 years is
500 + 100*144*(x/100)
= 500 + 144x
For the 1st freezer to cost less over 12 years,
623.95 + 129.6x < 500 + 144x
123.95 < 14.4x
8.61 < x
The minimum rate is 8.61 cents per kWh
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B for question 12
B for question 13
Step-by-step explanation:
U = Union
n= intercestion
B'= not b
A"= not a
so AnB'
should be B
if 2.50 = 1
2.50x8=
20
1×8 =
8
should be $8
Answer:
(a) 0 s
(b) 4.00 m
(c) -0.76 s
(d) +0.76 s
Step-by-step explanation:
It stops momentarily when the velocity, 
is 0. is the derivate of 
.
(a) 
Setting this to 0,
(b) Substitute this value for 
in to get its position.
m
It passes the origin when 
(c) The negative time is 
(d) The positive time is 
Answer: Your solution is <u>34206</u>
Hope this helps you!!!!
