Answer:
A. 
Step-by-step explanation:
4 × 16 = 84
7 × 12 = 84
6 x 14 = 84
Hope this helps!
63×8 =504 because you are using repeated addition r just regular multiplication
Answer:
7 hours
Explanation:
This week Melisa studied for 28 hours. Last week she studied 1/4'th of it.
So to find last week study hours. Divide this weeks study hours by 4.
Last week study hours:
- this week study hours ÷ 4



Let's try to find some primes that divide this number.
The number is not divisible by 2, because it is odd.
The number is divisible by 3 though, because the sum of its digits is:

So, we can divide the number by 3 and keep going with the factorization:

This number is again divisible by 3, because

We have

This number is no longer divisible by 3. Let's go on looking for primes that divide it: 5 doesn't because the number doesn't end in 0 nor 5. This number is not divisible by 7 or 11 either (just try). It is divisible by 13 though: we have

And 557 is prime, so we're done. This means that the prime factorization of 65169 is

The scale of the map is equal to 250 miles per 1.7 feet. or 250m/1.7ft. set up as a fraction.
Divide 250 by 1.7 to get how many miles are equal to just 1 foot.
250/1.7 = 147.058824 miles per 1 foot
Multiply that times 3.06 feet (the distance between C and D on the map)
147.058824m/1ft x 3.06ft = 450m
The actual distance between City C and City D should be 450 miles.