Asurvey was carried out among students in middle school to decide whether to buy a new set of instruments for the marching band or build a second scoreboard for a football field. which survey method would best represent the views of the entire school.

a- ask all the students who attended to the last football game

b- ask the first 5 students who walk in the hallway that morning

c- ask 40 random students that signed up for music this year

d - ask 50 people whose names was randomly chosen of the roster

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?