Macy is tutoring students in mathematics during her summer break. she charges $20 for a 30 minute session and $35 for an hour. the graph shows the number of 30 minute and 1 hour sessions she needs to have in order to make $280. during her first week of tutoring, she only has 1 hour sessions, but makes exactly $280. how many tutoring sessions did macy have during the first week?

Since Macy only had one hour sessions, divide the total she made by the price of the one hour session.

280 / 35 = 8 tutoring sessions

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 )