On a given daythe temperature in a pool increases with both the work of a heater modeled by the function h(t) and the Sun s(t) , depending on the amount of time that passes, t, in minutes Which graph could be the functions and their sum, c(t) ?

The answer is 1 because you have to flip the sign when dividing by negative number and 3

The answer to the question is d

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 )