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2 years ago

A circle has a radius of 14 feet. Round each answer to the nearest whole number.

Mathematics

1 answer:

3241004551 [841]2 years ago

8 0

Answer:

615.44

Step-by-step explanation:

Area formula is 3.14x Radiusx Radius=Area

Diameter is Radius*2

So 3.14*14*14=615.44

If this helps can I get brainlest pls.

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4a-b Evaluate the expression when a=5 and b=-7

stepladder [879]

Answer:

Step-by-step explanation:

So first we need to plug in 5 as the variable a and -7 as the variable b

4(5)-(-7)

Next we multiply the 4 and the 5 together to get 20

4(5) = 20 or 4 x 5 = 20

20-(-7)

Now we subtract negative 7 from 20

20-(-7) = 27

This can also be written as 20 plus 7 as a mathematical rule states: two negatives make a positive. So:

20-(-7) = 20 + 7

Both of these are equivalent in every sense of the word and give us our final answer of 27

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3 years ago

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HELP ASAP!! What is the length of PQ? 12 km 16 km 18 km 20 km

natima [27]

20 km is the correct answer

4 0

2 years ago

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I'll give brainliest!!

Elza [17]

Answer:

x>-2

3+4x>-5

4x>-5-3

4x>-8

x>-2

the answer is x>-2

6 0

2 years ago

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1/6 x 2/3 please help

Alex777 [14]

Answer:

2/18 or 1/9

Step-by-step explanation:

just directly multiply it 2×1=2

6×3=18 so 2/18 simplify 1/9

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2 years ago

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The population of a county is growing at a rate of 9% per year, compounded continuously. How many years will it take for the pop

torisob [31]

Answer:

$t=15.4\ years$

Step-by-step explanation:

The exponential growth function compounded continuously is equal to

$A=P(e)^{rt}$

where

A is the final population

P is the initial population

r is the rate of growth in decimal

t is Number of years

e is the mathematical constant number

we have

$A=4x\\P=x\\ r=9\%=9/100=0.09$

substitute in the function above

$4x=x(e)^{0.09t}$

simplify

$4=(e)^{0.09t}$

Take natural log of both sides

$ln(4)=ln[(e)^{0.09t}]$

$ln(4)=0.09t(ln(e))$

$ln(e)=1$

$ln(4)=0.09t$

$t=ln(4)/0.09$

$t=15.4\ years$

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3 years ago