Find ? if ? is between 0° and 90°. Round your answer to the nearest tenth of a degree.
?
sin ?= 0.6792
?
?= __________°
Fill in the blank(s) with the appropriate word(s).
42.8
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Solve the problem.The length of the ellipse x = a cos t, y = b sin t, 0 ? t ? 2? is Length = 4a
where e is the ellipse's eccentricity.Use Simpson's Rule with n = 6 to estimate the length of the ellipse when a = 2 and e = 1/3.
A. 11.2546 B. 12.2097 C. 11.8956 D. 12.1751
Multiply and check the product.
A. 391 B. 271 C. 280 D. 291
Solve the system of equations using substitution.
A. x = -5, y = -1; x = 8, y = 
or (-5, -1), 
B. x = 5, y = 1; x = -8, y = - 
or (5, 1), 
C. x = -5, y = -1; x = 
, y = 8
or (-5, -1), 
D. x = 5, y = 1; x = - 
, y = -8
or (5, 1), 
For the application, round the number as instructed.According to a study, life expectancy has increased by 34.26 years over the past century. Round this decimal to the nearest year.
A. 34 years B. 30 years C. 34.3 years D. 34.26 years