PLZ HELP, I HAVE FREE POINTS IF WANTED The cruising speed of the bullet train will be no less than 150 miles per hour.

Use s to represent the train's cruising speed (in miles per hour).

AND

To ride a roller coaster, a visitor must be at least 52 inches tall.

Use h to represent the height (in inches) of a visitor able to ride.

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 )