Which equations for the measures of the unknown

angles x and y are correct? Check all that apply.

x= cos-11)

x = sin-1!

x= tan-1!

Dy=sin 11 )

y= cos(0)

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

1/5^2 = 7.56/45

no ,sorry if you needed it but you can ask and try to see if any one will anwser ,

step-by-step explanation:

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30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles