Sound travels about 750 miles per hour. a) suppose it takes about 1.5 seconds to hear the echo. how far away is the canyon wall, in feet? for this i got 825 ft b) suppose you stand 1,925 feet from the canyon wall and sound the horn. how long will it take to hear the echo? (i'm stuck on this)

1. 1,650 ft

2. 1.75 sec

Step-by-step explanation:

Sound travels about 750 miles per hour. Convert the sound's speed into feet per second. Since

1 mile = 5,280 feet, then

750 miles = 750·5,280 feet = 3,960,000 feet.

1 hour = 60 minutes,

1 minute = 60 seconds, then

1 hour = 3,600 seconds.

Hence,

1. If it takes about 1.5 seconds to hear the echo, then the canyon is

away.

2. If you stand 1,925 feet from the canyon wall and sound the horn, then it will take

to hear the echo.

A. 824 feet   B. 3.5 seconds

Step-by-step explanation:

A) We hear the echo after 1.5 seconds. Let the distance from a person to canyon wall is x miles.

Then echo of a sound will travel the distance (2x) miles

Since speed =

Here speed of sound = 750 miles per hour

                           or     = miles per second

                                   = 0.208 miles per second

and time  = 1.5 seconds

Now we plug in the values in the formula

0.208 =

x =

  = 0.156 miles ≈ 0.156 × 5280

  ≈ 824 feet.

B) If the person is standing 1,925 feet from the canyon wall then we have to find the time after which he will hear the echo.

Since speed =

Here speed = 750 miles per hour

and Distance = 2 × 1925 feet or = 0.73 miles

We will plug in these values in the formula.

750 =

t =

  = 0.00097 hours

  ≈ 0.00097 × 3600 seconds

  ≈ 3.5 seconds

the answer is a

step-by-step explanation:

39.00 x 24 = total installment price

carrying installment price - cash price

needed to save the .00/

1/3

step-by-step explanation:

to find this, you can divide 12 by 4 which is 3 or you can multiply 4 until you reach 12 (4x3=12). both should give you 3, meaning theres three times less bananas than there are oranges.