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Choose the correct answer. If y varies jointly as x and z, and y = 30 when x = 10 and z = 8, find y when x...
5) Choose the correct answer.
If y varies jointly as x and z, and y = 30 when x = 10 and z = 8, find y when x = 15 and z = 20.
20
112 1/2
120
75
6) Choose the correct answer.
Wind resistance varies jointly as an object's surface area and velocity. If an object traveling at 60 miles per hour with a surface area of 15 square feet experiences a wind resistance of 200 Newtons, how fast must a car with 45 square feet of surface area travel in order to experience a wind resistance of 250 Newtons?
25 miles per hour
12 miles per hour
If y varies jointly as x and z, and y = 30 when x = 10 and z = 8, find y when x = 15 and z = 20.
20
112 1/2
120
75
6) Choose the correct answer.
Wind resistance varies jointly as an object's surface area and velocity. If an object traveling at 60 miles per hour with a surface area of 15 square feet experiences a wind resistance of 200 Newtons, how fast must a car with 45 square feet of surface area travel in order to experience a wind resistance of 250 Newtons?
25 miles per hour
12 miles per hour