Three boards are placed end to end to make a walkway. The first board is 4 feet inches 10 long, the second board is 2 feet 11 in
2 answers:
<em>Answer:</em>
<em>Answer:the answer is 10 feet and 16 inches</em>
<em>Answer:the answer is 10 feet and 16 inchesStep-by-step explanation:</em>
<em>b</em><em>y</em><em> </em><em>a</em><em>d</em><em>d</em><em>i</em><em>n</em><em>g</em><em> </em><em>a</em><em>l</em><em>l</em><em> </em><em>t</em><em>h</em><em>e</em><em> </em><em>feet</em><em> </em><em>a</em><em>n</em><em>d</em><em> </em><em>all</em><em> </em><em>t</em><em>h</em><em>e</em><em> </em><em>i</em><em>n</em><em>c</em><em>h</em><em>e</em><em>s</em><em> </em><em>w</em><em>e</em><em> </em><em>c</em><em>a</em><em>n</em><em> </em><em>h</em><em>a</em><em>v</em><em>e</em><em> </em><em>o</em><em>u</em><em>r</em><em> </em><em>answer</em>
- <em>first</em><em> </em><em>we</em><em> </em><em>add</em><em> </em><em>all</em><em> </em><em>the</em><em> </em><em>feet</em>
<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em>
<em></em>
- <em>then</em><em> </em><em>we</em><em> </em><em>will</em><em> </em><em>add</em><em> </em><em>all</em><em> </em><em>the</em><em> </em><em>inches</em>
<em></em>
- <em>the</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>1</em><em>0</em><em> </em><em>feet</em><em> </em><em>and</em><em> </em><em>1</em><em>6</em><em> </em><em>inches</em>
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Answer:
The 98% confidence interval for the mean amount spent on their child's last birthday gift is between $40.98 and $43.02.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 24 - 1 = 23
98% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 23 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.5
The margin of error is:
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 42 - 1.02 = $40.98.
The upper end of the interval is the sample mean added to M. So it is 42 + 1.02 = $43.02.
The 98% confidence interval for the mean amount spent on their child's last birthday gift is between $40.98 and $43.02.
Answer:
0.5 < t < 2
Step-by-step explanation:
The function reaches its maximum height at ...
t = -b/(2a) = -16/(2(-16)) = 1/2 . . . . . . where a=-16, b=16, c=32 are the coefficients of f(t)
The function can be factored to find the zeros.
f(t) = -16(t^2 -1 -2) = -16(t -2)(t +1)
The factors are zero for ...
x = -1 and x = +2
The ball is falling from its maximum height during the period (0.5, 2), so that is a reasonable domain if you're only interested in the period when the ball is falling.
