Answer:
The answer is E. Impossible to determine
Step-by-step explanation:
Normally, you would find the Confidence interval of a normal sample by using
X(-+) Z* Sigma/n
Where x is the mean, sigma the standard deviation n the size of the sample and z the value determined by your confidence interval size of 95%
.However, this approximation of a confidence interval may only be used for a sample if the number of observations is at least 30 or above. When we have less observations than 30 we must use the standard deviation of the populations. But we only have a sample standard deviation so its not adequate or possible to determine CI the true mean of the population with such a small sample size.
Answer:
(D)144.8 feet
Step-by-step explanation:
Given the equation which models the path of the baseball
where x is the horizontal distance, in feet, the ball travels and y is the height, in feet, of the ball.
To determine how far from the batter the ball will land, we determine the distance x at which the height, y=0.
We use the quadratic formula to solve.
In the quadratic equation above, a=-0.005, b=0.7, c=3.5
Since x cannot be negative, x=144.8 feet to the nearest tenth of a foot.
<u>The correct option is D.</u>
Answer:
2,520 nickles in $126
Step-by-step explanation:
126 dollars x 100 cents
= 12,600 cents
then
12,600 cents / 5 cents
= 2,520 nickels
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Answer:
x-value is 4
Step-by-step explanation:
2x-3y=-1
3x+4y=24
We can solve the equation by eliminating y
We multiply the first equation by 4 and the second by 3
4(2x-3y=-1 )
3(3x+4y=24)
8x -12y = -4
9x +12y = 72
Then we add the two equations;
8x -12y = -4
9x +12y = 72
17x = 68
x = 4
Thus the x-value is 4
