If the pitcher’s mound and home plate are 60 ft apart, how much time (in seconds) does the batter have to react to a 90 mph fastball?
a. 0.45 seconds
b. 1 second
c. 1.5 seconds
d. 2 seconds
a. 0.45 seconds
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Drawings used for most welding projects can be divided into two categories-orthographic projections and ____________________.
Fill in the blank(s) with the appropriate word(s).
Benjamin used regression analysis to fit quadratic relations to monthly revenue, R, and total cost, TC, data with the following results, where Q is quantity.
R = ?0.008Q2 + 32Q TC = 0.005Q2 + 2.2Q + 10 (a) Using a spreadsheet, plot R and TC. Estimate the quantities QBE and Qp, where the maximum profit should occur. Estimate the amount of profit at this quantity. (b) The profit relation P = R ? TC and calculus can be used to determine the quantity Qp at which the maximum profit will occur and the amount of this profit. The equations are: Profit = aQ2 + bQ + c Qp = ?b/2a Maximum profit = ?b2/4a + c Use these relations to confirm your graphical estimate of QP. (Your instructor may ask you to derive the relations above.)
What is the total system charge for a system with a factory charge of 56 oz of R-410A, an assumed length of 15 ft, and a 3/8 in liquid line that is 35 ft long?
A) 56 oz B) 56 oz + 12 oz = 68 oz C) (35 - 15 ) × 0.6 = 12 oz D) 56 oz + 21 oz = 77 oz
Technician A says one of the six principal air pollutants regulated by the EPA is nitrogen. Technician B says carbon dioxide contributes to global warming.
A. A only B. B only C. both A and B D. neither A nor B