David says, “72 kilometres per hour is faster than 20 metres per second."
(b) Is David correct?
You must show how you get your answer.

no, 72 km/hr is equal to 20m per sec

Step-by-step explanation:

20 m = .02 km

.02 km per hour is equal to .02(3600) per hour, which is 72 km per hour

(you have to multiply my 3600 to get seconds into hours)

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.

answer: y=0 if that is what u r looking for