Why?
The liters of milk remaining in the tank after leaking for t weeks is represented by an exponential function. An exponential function is a mathematical function in which the independent variable appears as an exponent.
The function that represents the liters of milk remaining in the tank after leaking for t weeks is an exponential function. An exponential function is a mathematical function in which the independent variable appears as an exponent. In this case, the liters of milk lost each week is constant, so the amount of milk remaining in the tank is decreasing exponentially over time.
Formula for exponential decay: M = P * (1 - r)^t, where M is the amount of milk remaining, P is the initial amount of milk, r is the rate of decay, and t is the number of weeks.
In this case, the initial amount of milk, P, is 600 liters and the rate of decay, r, is 60/600 = 0.1 (10%). So the exponential function that represents the liters of milk remaining after t weeks is M = 600 * (1 - 0.1)^t.
#SPJ2
7% sales tax?
Answer:
$35.31
Step-by-step explanation:
In this question, we're trying to find the total cost of the pumpkins (including tax).
We know that Carter picked a $20 pumpkin, while Isabelle picked a $13 pumpkin.
We also know that the sales tax is 7%
To get your answer, we would add the prices of the pumpkin and find the tax price to get our final answer.
Find the total cost:
20 + 13 = 33
Since the sales tax is 7%, we would multiply 33 by 1.07:
33 · 1.07 = 35.31
Mrs. Stephan paid $35.31 for the pumpkins and sales tax.
To calculate the z-statistic, we must first calculate the standard error.
Standard error is standard deviation divided by the square root of the population. In this case, it is equal to 1.81.
The z-score is defined the distance from the sample to the population mean in units of standard error.
z = (26 – 20)/1.81 = 3.31
at this z-score = 0.0005 which is less than 5%
the answer is C. the z- statistic is 3.32, so the null hypothesis should be rejected.