# HW #1 - Homework #1 (Homework) Assignment Submission For...

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Homework #1 (Homework) Assignment Submission For this assignment, the number of submissions for each answer box is counted independently. The number of submissions remaining changes only if you submit a new or changed answer. 1. Question Details Notes Question: SPreCalc5 1.2.060. Question part Submissions 1 0/5 Simplify the expression and eliminate any negative exponent(s). Assume that a and b denote positive numbers. ( 49 a 6 b 2 ) 3/2 Your work in question(s) will also be submitted or saved. 2. Question Details Notes Question: SPreCalc5 1.2.070. Question part Submissions 1 0/5 Simplify the expression and eliminate any negative exponent(s). Assume that all letters denote positive numbers. Your work in question(s) will also be submitted or saved. 3. Question Details Notes Question: SPreCalc5 1.2.097. Question part Submissions 1 2 0/5 0/5 The speed of water flowing in a channel, such as a canal or river bed, is governed by the Manning Equation, V = 1.486 A 2/3 S 1/2

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p 2/3 n . Here V is the velocity of the flow in ft/s; A is the cross-sectional area of the channel in square feet; S is the downward slope of the channel; p is the wetted perimeter in feet (the distance from the top of one bank, down the side of the channel, across the bottom, and up to the top of the other bank); and n is the roughness coefficient (a measure of the roughness of the channel bottom). This equation is used to predict the capacity of flood channels to handle runoff from heavy rainfalls. For the canal shown in the figure, A = 75 ft 2 , S = 0.050, p = 22.4 ft, and n = 0.030 . b 1 = 20 ft, b 2 = 10 ft, h = 5 ft (a) Find the speed at which water flows through the canal. (Round your answer to three decimal places.) ft/s (b) How many cubic feet of water can the canal discharge per second? [ Hint: Multiply V by A to get the volume of the flow per second.] (Round your answer to one decimal place.) ft 3 /s Your work in question(s) will also be submitted or saved. 4. Question Details Notes Question: SPreCalc5 1.3.039. Question part Submissions 1 0/5 Perform the indicated operations and simplify. Your work in question(s) will also be submitted or saved. 5. Question Details Notes Question: SPreCalc5 1.3.076. Question part
Submissions 1 0/5 Factor the expression completely. 2

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## This note was uploaded on 10/27/2010 for the course MAT 141 taught by Professor Staff during the Summer '08 term at CUNY John Jay.

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HW #1 - Homework #1 (Homework) Assignment Submission For...

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