Answer:
The approximate percentage of SAT scores that are less than 865 is 16%.
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
Approximately 68% of the measures are within 1 standard deviation of the mean.
Approximately 95% of the measures are within 2 standard deviations of the mean.
Approximately 99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean of 1060, standard deviation of 195.
Empirical Rule to estimate the approximate percentage of SAT scores that are less than 865.
865 = 1060 - 195
So 865 is one standard deviation below the mean.
Approximately 68% of the measures are within 1 standard deviation of the mean, so approximately 100 - 68 = 32% are more than 1 standard deviation from the mean. The normal distribution is symmetric, which means that approximately 32/2 = 16% are more than 1 standard deviation below the mean and approximately 16% are more than 1 standard deviation above the mean. So
The approximate percentage of SAT scores that are less than 865 is 16%.
Step-by-step explanation:
the equation :
Hn = 7n + 3
where :
Hn : the height of trees at year to-n
n : year to-n (n = 1,2,3,...)
so, the rate of change : increasing 7 feet per year.
The answer is 4.85, rounded
Answer:
$4.82
Step-by-step explanation:
4 one dollar bills
8 dimes which are .10 cents each
2 pennies which are .1 cents each
1+1+1+1+.10x8+.1x2=4.82
include dollar sign in front of the money
Answer:
y=0
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
2.6y-4/15y+7/6y=7/3y
2.6y-(-)4/15y+7/6y=7/3y
(2.6y-4/15y+7/6y)=7/3y (combine like terms)
7/2y = 7/3y
Step 2: Subtract 7/3y from both sides.
7/2y - 7/3y = 7/3y - 7/3y
7/6y = 0
Step 3: Multiply both sides by 6/7
6/7 . 7/6y = 6/7 . 0
y = 0
