The Puerto Rican Trench is one of only two trenches in the Atlantic ocean. When sonar is used to detect the depth of the ocean at this trench, and it takes 11.73 seconds for the ship to receive the signal back, how deep is the trench? Assume the speed of sound in water is 1500m/s. (Be sure to include a unit in your answer. (** Use scrap paper and a calculator.) Formulas: depth = , (1500 m/sec xecho travel time) Velocity= distance / time

show us the picture

step-by-step explanation:

show the !

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.