Answer:
2
Step-by-step explanation:
The z-score is the number of standard deviations the value is above the mean. If that number is 2, then Z=2. If that number is -2, then Z=-2.
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Both Z=2 and Z=-2 are values that are two standard deviations from the mean.
I I'm almost positive the correct answer is c
Robert is incorrect: Surface are of A is 30 + 30 + 42 + 42 + 35 + 35 = 214 square centimeters. Surface area of B is 120 + 120 + 168 + 168 + 140 + 140 = 856 square centimeters. B's surface area is 4 times as great as A's.
Answer: $338 decrease. $4,862 total at the end of the year.
Step-by-step explanation: 6.5% of $5,200 is $338. $,5,200 - $338 = $4,862
Hope this helps!
Answer:
3 : 10
Step-by-step explanation:
most simplified form