A park ranger uses two drones to observe wildlife. After letting the drones hover at the same height for a while, she decreases the height of the first drone by 3834 feet in order to take pictures. She also decreases the height of the second drone, but only by 20% of the decrease in height of the first drone. Which THREE methods could be used to find the change in height, in feet, of the second drone?
A
Multiply −3834 by 15.
B
Multiply −38.75 by 0.2.
C
Multiply −38 by 0.2. Then add 0.75.
D
Multiply −3834 by 110. Then multiply by 12.
E
Multiply −38 by 15. Then multiply −34 by 15. Add the products.

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 )

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