Mathematics, 22.07.2020 09:01 kiingbr335yoqzaxs

Solving exponential functions

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Answer from: nulledcracker12

approximately 30

Step-by-step explanation:

$f(x) = 4 {e}^{x}$

$f(2) = 4 {e}^{2}$

$f(2) = 4 \times 7.389$

f(2) = 29.6

( Approximately 30)

Hope this helps..

Good luck on your assignment..

Answer from: park7497

approximately 30

Step-by-step explanation:

f(x)=4e^x

Put x as 2 and evaluate.

f(2)=4e^2

f(2)=4(2.718282)^2

$f(2)= 29.556224 \approx 30$

Answer from: Quest

step-by-step explanation:

30% of $420 is 0.30($420) = $126 and $420 + $126 = $546.

or, 130% of $420 is 1.3($420) = $546.

notice that this is not the $600 original list price with which we started.

why doesn't this work?

the method does not work because 30% of $420 is not the same amount as the 30% of $600. it may seem obvious when stated this way, but it is a very common error made on problems of this type. we cannot just use the same percent and get back to the original amount because we are taking that percent of a different value.

to work problems of this type correctly, it is generally best to write an equation for the situation and then solve.

example: since (100% – 30%)(original price) = (sale price)

70% of the (original price) is $420.

0.7x = 420

equation image indicator

x = 600

the original cost was $600.

we may also solve this problem using the two-step method. working the problem in two steps requires us to use more algebra skills. we have to know that x = 1x (identity property of multiplicationtext annotation indicator) and that 1x – 0.3x = 0.7x (subtracting like terms). then we solve the problem as follows:

(original price) – 30%(original price) = sale price

x – 0.3x = 420

0.7x = $420

equation image indicator

x = 600

the original cost was $600.

note that with both of the above methods we do obtain the correct original amount.

example: after a 5% pay raise, hermione is earning $22,680 per year. what was she earning before the pay raise?

105% of (original salary) = current salary

1.05x = 22,680

equation image indicator

x = 21,600

hermione earned $21,600 per year before the pay raise.

this is an example so maybe you will get how to at least do it!

Answer from: Quest

step-by-step explanation:

it would be see because your formula is f(x)=6x, so 6 times 1 is 6 and you go on and the best answer is c.

49 points me! it's a multiple choice, but still show your work so i know you're right. you so so

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Solving exponential functions
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