The diagram shows an isosceles triangle. all the measurements are in cm. work out the perimeter of the triangle. how do i achieve the other 3 marks (putting what shows in the box got me 1/4 marks)? putting "cm" after the numbers did nothing.

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

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

Which one ? is the answer and how to find this answer