The rule of 72 will have you divide 72 over the interest rate in percent form. Ignore the percent symbol
So we'll divide 72 over 8.47 to get...
72/8.47 = 8.50059
which is roughly 8.5 years for the money to double
If we round to the nearest whole number, then it takes 9 years for the money to double (according to the rule of 72). The year 1999 isn't listed so the next best choice is the year 2000. So I'm fairly confident the answer is C) 2000. Though your teacher may have 1998 in mind for some reason. If it were me, I'd go with 2000 because the year 1998 will have the account balance short of the goal of $10,000.
Answer: Choice C) 2000
Carlos driving time = Xh, Maria driving time = Yh.
55m/h*Xh + 47m/h*Yh = 197m
Together, they both drove 3,8 hours, so Carlos drove 3,8 hours minus the time Maria drove;
55m/h*(3,8h-Yh)+47m/h*Yh = 197m
55m/h*3,8h - 55m/h*Yh + 47m/h*Yh = 197m
<span>209m - 8m/h*Yh = 197m
8mY = 209m - 197m
8mY = 12m
Y = 12m/8m
Y = 1,5
</span>The correct answer is 1,5 hours.
(100 + __ )+ 290 - 67.0034 = 411.9966
First add 67.0034 to both sides:
(100 + __ )+ 290 = 479
Now subtract 290 from both sides:
(100 + __ ) = 189
Subtract 100 from both sides:
189-100 = 89
The missing value is 89
Answer:
1.2!
Step-by-step explanation: