Awave x meters long has a speed of y meters per second. the frequency of the wave is, a) x/y hertz b) y/x hertz c) y times x hertz d) y+x hertz

wave length x frequency = c speed of light or y

so its b) y/x because c/x=f

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

80cm/s.

24cm/s.

53.3cm/s.