I need help with this math question with *finding the volume of a cone*
(Its not step 1 cause I got it wrong)

Three times the sum of a number and seven is negative thirty-six. what is the number?

What is the frequency of the sinusoidal graph?

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet. what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet