Which number produces an irrational number when multiplied by 1/3
a.0,
b. square root of 27
c, 1/3
d. negative square root of 16

We can simply observe that.

Since the product of two rational numbers is always rational, we have that

are all rationals, since they are the product of two rationals.

On the other hand, we have

and thus

which is irrational.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles