If an airplane’s speed is 300 miles per hour, what is it’s speed in feet per second? a. 60 feet per second b. 440 feet per second c. 26,400 feet per second d. 1,584,000 feet per second

B. 440 feet per second

Step-by-step explanation:

What you need to do is first convert miles to feet and then hours to seconds. Then you should be able to get the answer

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional