Answer:
The dimensions of the room is 8 and 13 feet.
Answer:
x=-5
Step-by-step explanation:
4x-7=-27
Add 7 to each side
4x -7+7 = -27+7
4x = -20
Divide by 4
4x/4 = -20/4
x =-5
Answer:
Step-by-step explanation:
If the starting point is (0,0), then she goes to (0, -8), then to (-13, -8), then to (-13, 0), then to (-7, 0). (-7, 0) is 7 units from the starting point. So, 7 blocks.
The "rule of 72" says that the doubling time in years is approximately 72 divided by the interest rate in percent. To make the money grow by a factor of 4 requires that it double twice, so will take twice as long as the period to double once.
2×72/11.3 ≈ 12.7 . . . . years
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The "rule of 72" is an approximation. The actual quadrupling time for this interest rate and compounding is about 12.6 years. (The actual product of doubling time and nominal interest rate is about 71.25.)
