Sound travels at 340 meters per second in air. (a) Find the distance traveled by sound in air in 7 seconds. Give your answer in kilometers.

In 7 seconds, sound travels ? kilometers.

(b) A boy clapped his hands near a cliff. He could hear the echo of his claps 3 seconds later. Find his distance from the cliff. (Remember an echo has to travel the entire distance and then back so you will need to divide by 2 before you give your final answer).

The boy is ? meters from the cliff.

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!