The side lengths of a 30-60-90 triangle are in the ratio 1 : sqrt.3 : 2. What is cos 30º?
A.
13
B.
1/2
C.
sqrt.3/3
D.
sqrt.3/2

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable