(a). Leigh got a thirty-cent raise after her first anniversary at work. If her starting salary was $7.50/hr.,what percent change did she experience in her raise?(b), Jay's weight increased 12% during his high-school years. If he weighed 158 lb. when he graduated,how much did he weigh when he began high school?(c). State the mathematical significance of 1 Kings 6:37-38a.

To explain the solution of the given problems.

Answered: (a). Leigh got a thirty-cent raise…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Length of a rod: Engineers on the Bay Bridge are measuring tower rods to find out if any rods have been corroded from salt water. There are rods on the east and west sides of the bridge span. One engineer plans to measure the length of an eastern rod 25 times and then calculate the average of the 25 measurements to estimate the true length of the eastern rod. A different engineer plans to measure the length of a western rod 20 times and then calculate the average of the 20 measurements to estimate the true length of the western rod. Suppose the engineer who collected 25 measurements for the eastern rod has a mean length of 23.9 feet with a standard deviation of 0.5 feet. The critical T-value for a 90% (one-sample) confidence interval with df = 24 is T=1.71. Which of the following is the resulting 90% confidence interval? (23.73 , 24.07) (23.05, 24.76) (23.80, 24.00)
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