The property of exponents says that when you divide two exponents with the same base, you can keep the base and subtract the exponents. So you can do 18-3, which is 15, so it would be 15 to the 15th power
Answer:
82.8 cm measured to the nearest tenth of 80cm.
Please see pic, I'd solved in it.
Answer: The confidence interval would be (120.6, 159.4).
Step-by-step explanation:
Since we have given that
n = 200
mean =
Standard deviation = 
At 95% confidence interval, z = 1.96
So, 95% confidence interval would be

Hence, the confidence interval would be (120.6, 159.4).