Determine the approximate minor arc length of CD.

Step-by-step explanation:

CB is the Hypotenuse of the right-angled triangle CDB.

Pythagoras :

CB² = 20² + 21² = 400 + 441 = 841

CB = sqrt(841) = 29

=> radius = 29/2 = 14.5

the total circumference of the circle (360 degrees) is

2×pi×r = 29×pi

but here we need only the part of the circumference for 180-70= 110 degrees.

CD arc = 29×pi × 110 / 360 = 29×pi×11/36 =

= 27.83800157 ≈ 27.84 cm

7

step-by-step explanation:

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)