two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 95 miles per hour. The westbound train travels at 105 miles per hour. How long will it take for the two trains to be 320 miles apart? Do not do any rounding.

  1.6 hours

Step-by-step explanation:

Their separation speed is 95 +105 = 200 miles per hour. The time required for the given distance is ...

  time = distance/speed

  time = (320 mi)/(200 mi/h) = 1.6 h

It will take 1.6 hours for the trains to be 320 miles apart.

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.