3 years ago

240,000 written as 10th power

Mathematics

1 answer:

kirill115 [55]3 years ago

3 0

The answer is 24 to the 4th power

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the length of a rectangle is 50 feet less than its width. If the perimeter of the field is 840 feet, find the length of the fiel

LiRa [457]

$look\ at\ the\ picture\\\\2a+2(a-50)=840\\\\2a+2a-100=840\\\\4a-100=840\ \ \ /+100\\\\4a=940\ \ \ \ /:4\\\\a=235\ (ft)\\\\a-50=235-50=185\ (ft)\\\\Answer:lenght=185\ ft;\ width=235\ ft.$

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3 years ago

F(x) = 5x2+2x2 - 90x - 36<br><br> find all zeros by factoring

Nadya [2.5K]

Answer:

10x+4x-90x-36

14x-90x=36

76x=36

X=36/76

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Answer:

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Step-by-step explanation:

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3 years ago

Someone help me please <br> 13x+7<br> 9x+9

Nuetrik [128]

Answer:

x= 1/2

Step-by-step explanation:

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An element with mass 210 grams decays by 8.3% per minute. How much of the element is remaining after 15 minutes, to the nearest

GarryVolchara [31]

Answer:

$57.2\ g$

Step-by-step explanation:

In this problem we have a exponential function of the form

$f(x)=a(b^x)$

where

f(x) is the remaining mass of the element in grams

x is the time in minutes

a is the initial value (y-intercept of the exponential function)

b is the base

r is the rate

$b=(1+r)$

In this problem we have

$a=210\ g$

$r=-8.3\%=-8.3/100=-0.083$ ---> is negative because is a decay's rate

$b=(1-0.083)=0.917$

substitute

The exponential function is equal to

$f(x)=210(0.917^x)$

For x=15 minutes

substitute in the function

$f(x)=210(0.917^15)$

$f(x)=57.2\ g$

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3 years ago