The area of a square with a perimeter of 40 cm is one-fourth the area of a circle. To the nearest tenth of a centimeter, what is the circumference of the circle? 31.4 cm

70.9 cm

125.7 cm

141.8 cm

400.0 cm

three-fourths of an hour

36÷48=0.75

0.75=

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

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step-by-step explanation:

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11) obtuse

13)right

15) acute