For Exercises 87-90 , use the Tangent feature from the DRAW menu to find the rate of change in part (b). Growth of a retirement fund. Maria deposits $20,000 in an IRA whose value increases by 5.6% every year. The value of the IRA after t years is modeled by V ( t ) = 20 , 000 ( 1.056 ) t . a. Use the model to estimate the value of Maria’s IRA after 7 yr. b. What is the rate of change in the value of the IRA at the end of 7 yr? c. When will Maria’s IRA have a value of $40,000?
For Exercises 87-90 , use the Tangent feature from the DRAW menu to find the rate of change in part (b). Growth of a retirement fund. Maria deposits $20,000 in an IRA whose value increases by 5.6% every year. The value of the IRA after t years is modeled by V ( t ) = 20 , 000 ( 1.056 ) t . a. Use the model to estimate the value of Maria’s IRA after 7 yr. b. What is the rate of change in the value of the IRA at the end of 7 yr? c. When will Maria’s IRA have a value of $40,000?
Solution Summary: The author calculates the value of Maria's IRA after 7yr, if she deposits 20,000 in a taxable account whose value increases by 5.6% every year.
For Exercises 87-90, use the Tangent feature from the DRAW menu to find the rate of change in part (b).
Growth of a retirement fund. Maria deposits $20,000 in an IRA whose value increases by 5.6% every year. The value of the IRA after t years is modeled by
V
(
t
)
=
20
,
000
(
1.056
)
t
.
a. Use the model to estimate the value of Maria’s IRA after 7 yr.
b. What is the rate of change in the value of the IRA at the end of 7 yr?
find the zeros of the function algebraically:
f(x) = 9x2 - 3x - 2
Rylee's car is stuck in the mud. Roman and Shanice come along in a truck to help pull her out. They attach
one end of a tow strap to the front of the car and the other end to the truck's trailer hitch, and the truck
starts to pull. Meanwhile, Roman and Shanice get behind the car and push. The truck generates a
horizontal force of 377 lb on the car. Roman and Shanice are pushing at a slight upward angle and generate
a force of 119 lb on the car. These forces can be represented by vectors, as shown in the figure below. The
angle between these vectors is 20.2°. Find the resultant force (the vector sum), then give its magnitude
and its direction angle from the positive x-axis.
119 lb
20.2°
377 lb
University Calculus: Early Transcendentals (4th Edition)
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