If a note is too high or too low to be written in the traditional way on a staff, a music composer may write notes on short, horizontal ledger lines above and below the staff. a. true b. false

True

Explanation:

If a singer's range is higher or lower than what can be written on the traditional way given you have to use ledger lines to notate those extra notes because they're not within the five-line staff. Ledger lines are extra lines added above or below the staff for notes that are higher or lower than the notes on the staff.

See examples attached

perimeter = 2l +2w, divide total perimeter by 2 for total length of 1 side and 1 width

172/2 = 86 (  total for 1 side and 1 width)

86-24 = 62 (since length is 24 ft longer subtract 24 then divide by 2 for width)

62/2 = 31

width = 31 feet

length = 31 +24 = 55 feet

check: 31*2 = 62, 55*2 = 110,  110+62 = 172