Why does the following calculation have no answer? WILL GIVE BRAINLIEST HURRY UP THO sin^(-1)(2)= ?

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)