Is the function f(x)=(-4/3)^-6 an exponential function? If so, identify the base. If not, why not?

Mathematics

1 answer:

amm18122 years ago

7 0

Answer:

No. It is not because the function has no variables raised to an exponent (or any at all). If you simplify it, it's the same as saying f(x) = -729/4096

This of course assumes that it was transcribed correctly for the question. If there is an x within the function, then the answer may differ.

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Calls from a call box are charged per minute at one rate for the five minutes, then a different rate for each additional minute.

nirvana33 [79]

Answer:

c. $0.75 per minute at one rate for the first 5 minutes and $0.25 per minute thereafter

Step-by-step explanation:

The last 5 minutes of the 12-minute call cost ...

$5.50 -4.25 = $1.25

so the per-minute rate at that time is ...

$1.25/(5 min) = $0.25/min . . . . . . . . matches choice C only

You know the answer at this point, but if you want to check the rate for the first 5 minutes, you can subtract 2 minutes from the 7-minute call to find that ...

The first 5 minutes cost $4.25 - 2·0.25 = $3.75, so are charged at ...

$3.75/(5 min) = $0.75/min . . . . . . . matches choice C

5 0

2 years ago

What is the solution to the inequality l2n+5l > 1

posledela

$|2n+5| \ \textgreater \ 1\\
2n+5\ \textgreater \ 1 \vee 2n+5\ \textless \ -1\\
2n\ \textgreater \ -4 \vee 2n\ \textless \ -6\\
n\ \textgreater \ -2 \vee n\ \textless \ -3\\
n\in(-\infty,-3)\cup(-2,\infty)$