7.236 divided by .12 is 60.3
Answer:
A) The cost is the same at 5 months.
Step-by-step explanation:
Lets use m to represent the number of months it will take for the cost to be the same. If we set up an equation, we can write:
75 + 10m = 50 + 15m
-50 on both sides
25 + 10m = 15m
-10m on both sides
25 = 5m
Divide by 5 on both sides.
5 = m
That means it will take 5 months for the costs to be the same.
The annual interest rate will be $705.60
now onto the second one,
now, the extraneous part, I don't see either as extraneous, 3 and 12 do work, however, I take it is referring to the root, so if we nevermind the root has ± versions, and say only assuming the value coming from the root is say positive, then
Simply follow the units into quantities
E/(mT) = c
Where
E = energy
m = mass
T = temperature
c = specific heat
Solving for T
358/(15*T) = 0.385
T = 62°C