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kozerog [31]
3 years ago
10

How is 89 a prime number

Mathematics
1 answer:
ad-work [718]3 years ago
4 0
Hello,

10*10=100>89
n=89 is prime if it not divisible by all prime less then its square root

0<89<100 ==>0<√89<10
The primes to test are 2,3,5,7.
89 does not end with a even digit ==> 89 is not divisible by 2
8+9=17 if not divisible by 3 ==>89 is not divisible by 3
89 does not end with 0 or 5 ==>89 is not divisible by 5

3*8+1*9=33 is not divisible by 7 ==>89 is not divisible by 7

So: 89 is prime.


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<h3>What is division?</h3>

The division means the separation of something into different parts, sharing of something among different people, places, etc.

Given

The brand that is the better buy.

1.  Brand A: $2.16 for 18 ounces

So in $1, the ounces will be

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Brand A gives 8.33 ounces for $1.

2.  Brand B: $1.50 for 12 ounces

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More about the division link is given below.

brainly.com/question/369266

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