Answer:
Step-by-step explanation:
Write down the equation and solve for x.
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Answer:
53.3 yards
Step-by-step explanation:
you just have to divide 160 by 3 to get it in yards
Answer:
The coordinates are x=2 and y=16, or (2, 16)
Step-by-step explanation: The definition of the vertex of a parabola(the shown graph) is the highest or lowest point on the graph, depending which way the graph opens. When a graph opens upwards, towards positive y, the vertex is the lowest point. On the contrary, when the graph opens downwards, like this graph, the vertex is the highest point. On the graph, you can see clearly that the highest point on the graph has an x-value of 2 and a y-value of 16, making the vertex (2, 16)
Answer:
Step-by-step explanation:
Answer:
99% confidence interval bto estimate the average price customers are willing to pay per phone is between a lower limit of $471.356 and an upper limit of $514.
Step-by-step explanation:
Confidence interval = mean + or - Error margin (E)
mean = $492.678
sd = $26.4871
n = 14
degree of freedom = n - 1 = 14 - 1 = 13
confidence level = 99%
t-value corresponding to 13 degrees of freedom and 99% confidence level is 3.012
E = t×sd/√n = 3.012 × $26.4871/√14 = $21.322
Lower limit = mean - E = $492.678 - $21.322 = $471.356
Upper limit = mean + E = $492.678 + $21.322 = $514
99% confidence interval to estimate the average price customers are willing to pay per phone is between $471.356 and $514.