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saw5 [17]
3 years ago
7

Need help! Find the area

Mathematics
1 answer:
sammy [17]3 years ago
7 0
7. the formula for octagon is a=2(1+radical2)s^2
s=4
a=about 77.25
8.
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every prime number greater than 10 has a digit in the ones place that is included in which set of numbers below?
stich3 [128]
So we can start with the full of possibilities and eliminate them one by one.

The full set is {0,1,2,3,4,5,6,7,8,9}.

Now we know that any prime greater than 2 is odd as otherwise it would have 2 as a factor, so we can eliminate all of these digits that would be an even number, leaving:

{1,3,5,7,9}

We also know that any prime greater than 5 cannot be a multiple of 5 and that all numbers with 5 in the digits are a multiple of 5, so we can eliminate 5.

{1,3,7,9}

We know that 11,13,17 and 19 are all primes, so we cannot eliminate any more of these, leaving the set:

{1,3,7,9} as our answer.
8 0
3 years ago
Brock and Buzz have 10 friends. Buzz has 2 fewer fiends than Brock. How many friends does Brock have?
Anuta_ua [19.1K]


Buzz has 4 friends and Brock has 6.

The reason being is that Buzz has to have two less friend than Brock has, and yet still both have to add up to ten.

6 0
3 years ago
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What the round to the biggest place value for 2,356
Wewaii [24]
Round to the biggest place value, 2,356 in the thousands place so the thousandths place is the greatest value there so 2,356 rounded to the nearest thousandths is 2,000
7 0
3 years ago
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Annie's great-grandparents lived in a log cabin with their 3 children. The log cabin had a floor area of 450 square feet. The ce
scoray [572]

Answer:

you would have to multiply 450•7

4 0
3 years ago
John took out a loan for 18,550. To pay it back he will make 60 monthly payments of 389. How much will he pay in interest?
Debora [2.8K]

Answer:

He paid an of 4790

Step-by-step explanation:

If John took a loan of 18550

Then in 60 months, we will pay back 389 multiply by 60

389 × 60 = 23340

Therefore he paid an interest of 23340 minus 18550, that is

23340 - 18550 = 4790

3 0
3 years ago
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