Find the radian measure of the central angle of the circle of radius 7 meters that intercepts an arc of length 23 meters.
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: E
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Solve the problem.If ?1 and ?2 are complementary angles and ?1 is 5 times as large as ?2, then what are the measures of the two angles?
A. ?1 = 72°, ?2 = 18° B. ?1 = 75°, ?2 = 15° C. ?1 = 150°, ?2 = 30° D. Not enough information to solve
Find the area of the triangle using Heron's formula. Round your answer to two decimal places as needed.
A. 229.64 yd2 B. 45.93 yd2 C. 32.48 yd2 D. 162.38 yd2
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).2x + 3y = 6
A. r(2 sin ? + 3 cos ?) = 6 B. 2 cos ? + 3 sin ? = 6r C. 2 sin ? + 3 cos ? = 6r D. r(2 cos ? + 3 sin ?) = 6
Solve the problem.Suppose that 12% of the teachers at a university attended a conference. If 720 teachers attended the conference, how many teachers are at the university?
A. 72 teachers B. 72,000 teachers C. 7200 teachers D. 6000 teachers