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Two small planes approach an airport, one flying due west at 120 mi/hr and the other flying due north at 150 mi/hr. Assuming they fly at the same constant elevation, how fast is the distance between the planes changing when the westbound plane is 180 mi from the airport and the northbound plane is 225 mi from the airport.
evaluate approximately the ratio of the mass of the sun to that of the earth. lunar month 27.3 days, mean radii of the earth's orbit 149000000 km and that of moon's orbit 380000 km.
One day, the temperature at 8:00 A.M. was 41°F, and by 1:00 P.M. the temperature was 61°F. What was the hourly rate of temperature change?
carol purchases a car for 36000 makes a down payment of 10 and finances the rest with a 6-year car loan at an annual
A canyon is 2000 meters deep at its deepest point. A rock is dropped from the rim above this point. Write the height of the rock as a function of time t in seconds. (Use -9.8 m/s2 as the acceleration due to gravity.) How long will it take the rock..
What is the equation of the vertical line through P? What is the equation of the horizontal line through P?
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y:
A car goes from station A to station B with a speed of 80 km/h and returns from B to A with a speed of 120 km/h. Find its average speed during the whole journey.
Planning to study for your statistics examination with a group of classmates, one of whom you particularly want to impress. This student has volunteered to use Microsoft Excel to get the needed summary information, tables, and charts for a data..
What are the cylindrical coordinates of the point whose rectangular coordinates are x = - 4 , y= 2, and z = 4?
ght rooks are placed in distinct squares of an 8x8 chessboard, with all possible placements being equally likely. What is the probability that all rooks are safe from one another? (that there is no row or column that contains more than 1 rook)
1 consider the curvex t4 - 2t y t t4.a graph the curve using a computational software package.b use your graph to
two roads intersect at 34 degrees. two cars leave the intersection on diff roads at speeds of 80kmh and 100 kmh. after
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