Weather Bots is a manufacturer of neoprene weather balloons. As the 350 gram spherical balloon is being inflated with hydrogen, the radius of the balloon, in feet, is modeled by a twice differentiable function r, of time t, where t is measured in minutes. The table below gives selected values of the rate of change, r'(t) for the radius of Balloon A over the time interval 0

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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Chapter10: Radical Functions And Equations
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Weather Bots is a manufacturer of neoprene weather balloons. As the 350 gram spherical balloon is being inflated with hydrogen, the radius of the
balloon, in feet, is modeled by a twice differentiable function r, of time t, where t is measured in minutes. The table below gives selected values of the rate
of change, r'(t) for the radius of Balloon A over the time interval 0 < t< 10.
t (minutes)
2
4
7
9.
10
r' (t)
(feet per minute)
3.7
2.6
1.3
0.9
0.4
0.25
a. The radius of Balloon A is 5 feet whent = 4 minutes. Estimate the radius of the balloon whent =4.5, using tangent line approximation at t = 4. It is
known that the graph of r is concave down for the time 0 <t< 10. Is your approximation greater than or less than the true value?
b. Balloon B has been removed from service and the radius of the balloon is decreasing at a rate of 2 feet per second. Find the rate at which the volume
is decreasing when the radius of Balloon B is 2 feet. V =
Transcribed Image Text:Weather Bots is a manufacturer of neoprene weather balloons. As the 350 gram spherical balloon is being inflated with hydrogen, the radius of the balloon, in feet, is modeled by a twice differentiable function r, of time t, where t is measured in minutes. The table below gives selected values of the rate of change, r'(t) for the radius of Balloon A over the time interval 0 < t< 10. t (minutes) 2 4 7 9. 10 r' (t) (feet per minute) 3.7 2.6 1.3 0.9 0.4 0.25 a. The radius of Balloon A is 5 feet whent = 4 minutes. Estimate the radius of the balloon whent =4.5, using tangent line approximation at t = 4. It is known that the graph of r is concave down for the time 0 <t< 10. Is your approximation greater than or less than the true value? b. Balloon B has been removed from service and the radius of the balloon is decreasing at a rate of 2 feet per second. Find the rate at which the volume is decreasing when the radius of Balloon B is 2 feet. V =
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