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a-   The United States’ National Debt is increasing at a rate of $1.39×1012 per year. What...

a-   The United States’ National Debt is increasing at a rate of $1.39×1012 per year. What is this rate in dollars per second?

b- A = −6.00ˆ i + 8.00ˆ j. What is the magnitude and angle (measured counterclockwise from the x-axis, as usual) of this vector?

c-  A racecar’s position on an oval track is given by~ r(t) = (200m)cos(2πt/(20sec))ˆ i+(100m)sin(2πt/(20sec))ˆ j. What is its acceleration vector, in m/s2, at t = 17.5s?

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The United states Nati onal Debt is, Rs 1.39 x 10,year The rate in dollars per second is, R139x109 lyea3 154x10 s, 1 year 3.1

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