Which expression is equivalent to 30°?

A.) Inverse of cosine (StartFraction StartRoot 3 EndRoot Over 2 EndFraction)
B.) Inverse of sine (StartFraction StartRoot 3 EndRoot Over 2 EndFraction)
C.) Sine (StartFraction StartRoot 3 EndRoot Over 2 EndFraction)
D.) Cosine (StartFraction StartRoot 3 EndRoot Over 2 EndFraction)

If a boat travels 3 miles in 1.5 hours how far will it travel in 1 hour

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

Daniel expanded the expression as shown below -2(-8x-4y+3/4)=-10x-8y-11/4 what errors did he make? check all that apply