Answer: After 8 hours the pressure will be at -60?
Explanation: not sure how the balloon can reach -60 kilopascals but 15% of 300 is 45 and 45 x 8(hours) is 360. 300 - 360 is -60
Answer:
B) At alpha = 0.01, there is insufficient evidence to conclude the true mean wind speed at the site exceeds 25 mph.
Step-by-step explanation:
P-value of the test:
The p-value of the test is the probability of finding a sample mean above 25.
We are using the t-distribution, with test statistic t = 1.25 and 43 - 1 = 42 degrees of freedom. This probability is a right-tailed test.
With the help of a calculator, this p-value is of 0.1091.
Since the p-value of the test is 0.1091 > 0.01, at there is insufficient evidence to conclude the true mean wind speed at the site exceeds 25 mph, and the correct answer is given by option B.
Answer: He bought 46.875 pounds of rice for the week.
Step-by-step explanation:
Total rice he bought = (Number of dishes made in a week) x (portion of rice in each dish)
GIven: Each portion has 5 ounces of rice.
i.e. each portion has pounds of rice. [ 1 pound = 16 ounces]
Total rice he bought ( in pounds)=
Hence, he bought 46.875 pounds of rice for the week.
Step-by-step explanation:
90:120
9:12
3:4
Topic: ratio n proportions
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Answer:
Step-by-step explanation:
Multiply both sides by 3
Move variable to the right
Divide both sides by 2