At time t=0 hours a tank contains 3000 litres of water .
water leakes from the tank.
at the end of every hour there is a x% less water in the tank then at the start of the hour
the volume of water in litres, in the tank at time t hours is v1.
given that v1=k^1v0
v2=2881.2
work out the value of k and value of x

Ineed me i stuck and i don’t want to get it wrong

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

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