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Reptile [31]
3 years ago
5

Which of these statements is true for f(x)=3•(9)^x

Mathematics
2 answers:
svlad2 [7]3 years ago
8 0
A. The y-intercept is (0,3)
max2010maxim [7]3 years ago
4 0

Answer:

Option A is the correct choice.

Step-by-step explanation:

We have been given an equation f(x)=3\cdot (9)^x. We are asked to choose the correct statement about our given equation.

Let us see our given choices one by one.

A. The y-intercept is (0,3).

Let us find the y-intercept by substituting x=0 in our given equation.

f(0)=3\cdot (9)^0

f(0)=3\cdot 1

f(0)=3

Since the y-intercept of our given equation is (0,3), therefore, option A is the correct choice.

B. It is always decreasing.

We can see from our given equation that our given function represents exponential growth, where growth factor is 9, therefore, option B is not correct.

C. The domain of f(x) is x>0.

Since our function is defined for all real values of x, therefore, the domain of function is (-\infty,\infty) and our given statement is not true.

D. The y-intercept is (0,1).

Since the y-intercept of our given equation is (0,3), therefore, option D is not a correct choice.

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Erin wrote 5 checks for $35 each. What was the change in her checking account balance after writing these checks?
Neko [114]
$7.00. Because 5 divided by $35 equals $7.00.


7 0
3 years ago
Glados works as a nurse at a county hospital in Baton Rouge. Glados
Serga [27]

Answer:

Glados makes $44.76 per hour.

Step-by-step explanation:

Given:

Total hours Glados worked this week = 38.4

Amount earned by Glados this week = $1,718.64

To find her hourly earnings for the week.

Solution:

We will use unitary method to find the unit rate.

If for 38.4 hours Galdos earned = $1,718.64

Then for 1 hour she will earn = \frac{\$1,718.64}{38.4}=\$44.756\approx\$44.76

Thus, Galdos' hourly earnings for the week = $44.76

7 0
3 years ago
What is the 4 letter code?
ASHA 777 [7]
1:A
2:H
3:C
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8 0
3 years ago
Write 7x10x10x10x10 with an exponent
polet [3.4K]

Answer:

7x10^4

Step-by-step explanation:

Please add the thanks and rate me please

6 0
3 years ago
Read 2 more answers
PLZ HELP I BEEN SUCK FOE SO LONG PLZ RIGHT ANSWER I WILL CRY
mel-nik [20]

Answer:

40 students

Step-by-step explanation:

In this problem, one is given the ratio ( 8 : 3 ), since a ratio is another way of writing a fraction one can rewrite it as; \frac{8}{3} (8) represent the number of students who want to learn about magnets, and (3) represents the number of students who want to learn about magic tricks.

In the problem, it is also given that 25 more students wanted to learn about magnets compared to magic tricks. If one uses the parameter (x) to represent the factor by which the fraction \frac{8}{3} is reduced, then one can get the equation;

8x = 3x + 25

Use inverse operations to solve,

8x = 3x + 25

-3x

5x = 25

/5

x = 5

Substitute back in to find out how many students want to learn about magnets,

8x

= 8(5)

= 40

3 0
3 years ago
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