Aconstruction crew is lengthening a road. the road started with a length of 53 miles, and the crew is adding 3 miles to the road each day. let l represent the total length of the road (in miles), and let d represent the number of days the crew has worked. write an equation relating l to d. then use this equation to find the total length of the road after the crew has worked 31 days.

L = 53 + 3D146 miles

Step-by-step explanation:

(a) At 3 miles per day, after D days, the added length is 3D miles. When that is added to the original length, the total length is ...

  L = 53 + 3D . . . . miles

__

(b) When D=31, the length is ...

  L = 53 + 3·31 = 53 +93 = 146 . . . . miles

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )