Question 9 A full tank contains 8.90 ft.3 of helium, enough to fill 30 balloons.

To calculate the amount of helium needed to fill 50 balloons, first determine the unit rate, which can be calculated as 30/8.90. Next, create an equation to represent the relationship between h, the volume of helium, and b, the number of balloons: _[blank 1]_. Finally, plug in 50 for b and solve. The amount of helium needed is _[blank 2]_.

Use a transformation to solve the equation. w/4 = 8 can you also leave a detailed explanation on how this equation = 32

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10

Arace is 10 kilometers long.markers will be placed at the beginning and end of the race course and at each 500 meter mark.how many markers are needed to mark the course for the race?