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Mathematics

1 answer:

AURORKA [14]3 years ago

6 0

Answer:

Step-by-step explanation:

I've forgotten the exponent rules for exponent operations, but one way to do this is to find the value of the expression given (2^-5 * 2^7)^-3 (which is equal to 0.015625) using a calculator, then use your calculator to find which answer choice is equal to the expression given AKA 0.015625. I did this and got A, but you should probably still look up exponent rules for future reference. Trust me, this question is actually WAY easier than what it probably looks like to you, as long as you know the exponent rules. :)

Give me Brainliest and have a great day! :)

Cheers!

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dee’s age is twice Max’s age plus two more.Write an expression to represent Dee’s age.Then evaluate the expression when Max is 7

Mandarinka [93]

D=2x+2

X=7

Plug in the value for Max's age.

D=2(7)+2

D=14+2

D=16

Max is 7

Dee is 16

5 0

2 years ago

Read 2 more answers

In 2000, the population of Big Springs was 13 thousand. Use the given doubling

trasher [3.6K]

Answer:

The answer is "26179.4".

Step-by-step explanation:

Assume year 2000 as t, that is t =0.

Formula:

$A= A_0e^{rt}$

Where,

$A_0 = \ initial \ pop \\\\r= \ rate \ in \ decimal \\\\t= \ time \ in \ year$

for doubling time,

$r = \frac{log (2)}{t} \\$

$r = \frac{\log (2)}{ 40} \\\\r= \frac{0.301}{40}\\\\r= 0.007$

Given value:

$A = A_0e^{rt} \\\\$

$A_0 = 13000$

$t= 40 \ years$

when year is 2000, t=0 so, year is 2100 year as t = 100.

$A = 13000 \times e^{et}\\\\A = 13000 \times e^{e \times t}\\\\A = 13000 \times e^{0.007 \times 100}\\\\A = 13000 \times e^{0.7}\\\\A= 13000\times 2.0138\\\\A = 26179.4$