Question

exponential logarithm, is my answer correct?

Answer 1

it says to solve it by graphing, but i find it easier to do it the other way. i just wanna make sure this answer is right. could you check this? @kropot72

Answer 2

yes

Answer 3

agh, it said it was wrong. that was what i thought it might do. why might it have been wrong? do you get a different result when graphing?

Answer 4

oh actually you know what, maybe it should have been .702. i didnt round it.

Answer 5

it is not 100% very close

Answer 6

My calculated answer is x = 0.7018.

Answer 7

thats what i got as well..i just did another and it told me i was wrong but i am pretty sure i did it right.

Answer 8

4^2x=7
ln (4^2x)=ln 7
2x ln(4)=ln(7)
2x=ln(7)/ln(4)
x=ln(7)/2ln(4)

Answer 9

yes that is what i had done. i might have to contact my teacher and see what it is that im doing wrong.

Answer 10

I feel like we are solving it correctly, but there must be something i have to do with the answer..i am not sure because im getting the same answer as all of you.

Answer 11

How many decimal places are needed in your answers? Is it 4 places?

Answer 12

no it only lets me type 3, thats why it was a little weird.

Answer 13

just rounding the number

Answer 14

the others let me type 4, but when it asks me to solve it using graphing, it only lets me type 3.

Answer 15

actually, it is 4 places i can type, but because of the decimal point i only get to add 3 numbers. maybe i should try taking away the decimal?

Answer 16

first one is .7018xxxxxxxxx if you put 0.702 would be okay

Answer 17

yeah maybe, but that doesnt explain why it told me the second one was incorrect because i rounded that answer and it still said it was wrong.

Answer 18

If you solve by graphing, you will not get the precision in your answer that straight calculation give. Perhaps your answers are too exact compared with a graphical solution.

Answer 19

the second one is 0.2

Answer 20

Note that an approximate solution is required, as shown by the use of an 'approximately equals' sign.

Answer 21

okay maybe. so to graph them, which part do i put in for x and which part for y?

Answer 22

like if i were to try and graph it on desmos, how would i make the inputs? im not familiar with the form of that for the logarithms.

Answer 23

x is the number you just got.... and y is the equation

Answer 24

and thats how i put it into desmos to graph? i mean how would i solve the equation by graphing