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Leona [35]
3 years ago
5

Which statement is true about the domain of y = 3(2^-x)? Explain.

Mathematics
1 answer:
SVEN [57.7K]3 years ago
8 0
We want to determine the domain of {y=3 \cdot 2^{-x}=3 \cdot ({2^{-1}})^x=3 \cdot ({ \frac{1}{2}})^x

any function of the form y=f(x)=a \cdot b^x is called an "exponential function",
the only condition is that b is positive and different from 1, and a is a nonzero real number.

The domain of such functions is all real numbers.

That is for any x, the expression <span>3(2^-x) "makes sense".



Answer: </span><span>The domain is all real numbers</span>
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Step-by-step explanation: ITS RIGHT CAUSE I ACTUALY THOUGHT ABOUT IT

3 0
3 years ago
Jennifer has a job that pays $75,000 per year. How much will she pay in Medicare taxes? (Medicare taxes are 1.45% of earnings.)
klasskru [66]
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I hope this helps
6 0
2 years ago
Read 2 more answers
Solve the given system of equations.<br><br><br> The solution to the system is ( , ).
MAXImum [283]

Answer:

x=3

y=1

Step-by-step explanation:

First, get x and y on the left in the lower equation. -2x+10y=4. Then solve using a calculator. Select (apps), PlySmlt2, Simultaneous EQN Solver, and enter your euqations in.

3 0
2 years ago
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Alan's dogs have a total of 24 legs (l). If each dog has 4 legs, which equation gives the number of dogs (d) that Alan has?
N76 [4]
Your answer would be A
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3 0
3 years ago
Find the geometric sum: 40 + 20 + 10 + … + 0.078125
sveticcg [70]
S=40+20+10+\cdots+0.078125
S=40\left(1+\dfrac12+\dfrac14+\cdots+\dfrac1{512}\right)
S=40\left(1+2^{-1}+2^{-2}+\cdots+2^{-9}\right)

2^{-1}S=40\left(2^{-1}+2^{-2}+2^{-3}+\cdots+2^{-10}\right)

\implies S-2^{-1}S=40\left(1-2^{-10}\right)
\implies\dfrac12S=40\left(1-\dfrac1{1024}\right)
\implies S=80\left(1-\dfrac1{1024}\right)=\dfrac{5115}{64}=79.921875
4 0
3 years ago
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