Please help me with these and with full of explanation!!

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

answer is 270 degrees: -

to convert radians to degrees you multiply by 180/π

9π/ 6 * 180 / π

=   9 * 180 / 6

= 9 * 30

=   270 degrees   answer

i would first turn the percentage into an decimal by dividing it by 100, or moving the decimal place two left.

125/100 = 1.25

now multiply the original number by 1.25 to get the answer.

24 * 1.25 = 30

the width should be 30 m.