The following table shows the fuel efficiency (in miles per gallon) of a car in relation to the speed that it is traveling (in miles per hour).
Speed Fuel Efficiency
15
20.4
25
27.2
35
28.3
45
29.0
55
30.1
65
27.6
75
23.1
Use a graphing or online regression calculator to find the quadratic function of best fit for this set of data. Express the
function in standard quadratic form.

Which number produces a rationale number when multiplied by 1/5

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?