A reflecting telescope has a parabolic mirror for which the distance from the vertex to the focus is 34 feet. If the distance across the top of the mirror is 70 inches how deep is the mirror in the center? A) 1225/19584 in. B) 289/35 in. C) 1225/1632 in. D) 1225/136 in.
A reflecting telescope has a parabolic mirror for which the distance from the vertex to the focus is 34 feet. If the distance across the top of the mirror is 70 inches how deep is the mirror in the center? A) 1225/19584 in. B) 289/35 in. C) 1225/1632 in. D) 1225/136 in. Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations. x = t^3 + 1, y = t^3 - 15; -2 lessthanorequalto t lessthanorequalto 2 A) y = x - 16; -7 lessthanorequalto x lessthanorequalto 9 B. y = -x^2; -4 lessthanorequalto x lessthanorequalto 4 C) y = -x - 16; -7 lessthanorequalto x lessthanorequalto 9 D) y = x^3; -3 lessthanorequalto x lessthanorequalto 1 Solve the problem. Round to the nearest if needed. To save for retirement, you decide to deposit $2000 into an IRA at the end of each year for the next 40 years. If the interest rate is 9% per year compounded annually, find the value of the IRA after 40 years. A) $60, 819 B) $24, 330, 719 C) $675, 765 D) $618, 133 Find the indicated sum. Find the sum of the first 40 terms of the arithmetic sequence: 9, 1, -7, -15, ... A) -311 B) -6040 C) -5870 D) -5880 Find the quotient z1/z2 of the complex numbers. Leave answer in polar form. z1 = 8(cos 30 degree + i sin 30 degree) z2 = 4(cos 14 degree + i sin 14 degree) A) 2(cos 16 degree + i sin 16 degree) B) 2(cos 44 degree + i sin 44 degree) C) 4 (cos 16 degree - i sin 16 degree) D) 4(cos 15/7 degree + i sin 15/7 degree) Solve the problem. Two airplanes leave an airport at the same time, one going northwest at 405 mph and the other going east at 331 mph. How far apart are the planes after 3 hours (to the nearest mile)? A) 681 miles B) 1628 miles C) 1741 miles D) 2042 miles
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