A score of 85 would be 1 standard deviation from the mean, 74. Using the 68-95-99.7 rule, we know that 68% of normally distributed data falls within 1 standard deviation of the mean. This means that 100%-68% = 32% of the data is either higher or lower. 32/2 = 16% of the data will be higher than 1 standard deviation from the mean and 16% of the data will be lower than 1 standard deviation from the mean. This means that 16% of the graduating seniors should have a score above 85%.
The answer is A as he has all of the quarters when he spends no time in the arcade
Answer:
72
Step-by-step explanation:
When an expression contains more than one sign, the rule of BODMAS is applied. Bracket of Division Multiplication Addition and Subtraction. And the signs will be solved in that order.
6[4x(72-63) divided by 3]
We solve the bracket first
(72-63)
9
The next is multiplication, inside the bigger bracket.
6[4x9 divided by 3]
Then division
6(36 divided by 3)
6(12)
72
50% of X-Treamline Crank Radios are likely to play 30 minutes or longer after 30 cranks, while only 25% of Secure Hike Emergency Radios are likely to play 30 minutes or longer after 30 cranks
