Which of the following are valid values for a String? (Select all that apply)

None of these are valid strings.
'X'
'bird'
"false"
"PK fire"
"17"
She sells sea shells
true

The place where the extended axis of the earth would touch the celestial sphere is called the celestial

An english teacher would like to divide 8 boys and 10 girls into groups, each with the same combination of boys and girls and nobody left out. what is the greatest number of groups that can be formed?

The guy wire bd exerts on the telephone pole ac a force p directed along bd. knowing the p must have a 720-n component perpendicular to the pole ac, determine the magnitude of force p and its component along line ac.