Answer: the answer is 7cm
Step-by-step explanation:if the diameter is 14, just do 14/2=7
3x + 20 = 40 + 40
3x = 60
X = 20
V + 71 = 107
V = 36
Changed both of them to a fraction
Answer:
b
Step-by-step explanation:
you can break the 78 into 70 and 8, and multiply them separately by 6 and then add the two answers to get 468
Answer: C.-1.5
Step-by-step explanation:
Given: The burning time of a very large candle is normally distributed with mean of 2500 hours and standard deviation of 20 hours.
Let X be a random variable that represent the burning time of a very large candle.
Formula:
For X = 2470
So, the z-score they corresponds to a lifespan of 2470 hours. =-1.5
Hence, the correct option is C.-1.5.