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3 years ago

Help ill mark brainliest if right

Mathematics

1 answer:

PtichkaEL [24]3 years ago

8 0

Answer:

im pretty sure its 64 if not im so sorry

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If f(x)f(x) is an exponential function where f(-1)=5f(−1)=5 and f(7)=32f(7)=32, then find the value of f(4)f(4), to the nearest

Whitepunk [10]

Using an exponential function, it is found that the value of the function when x = 4 is of f(4) = 15.95.

<h3>What is an exponential function?</h3>

It is modeled by:

$y = ab^x$

In which:

a is the initial value.

b is the rate of change, as a decimal.

In this problem, we have that f(-1)=5, hence:

$5 = ab^{-1}$

$\frac{a}{b} = 5$

a = 5b

We also have that f(7)=32, hence:

$32 = ab^7$

Since a = 5b:

$5b^8 = 32$

$b = \sqrt[8]{\frac{32}{5}}$

b = 1.2612.

a = 5b = 5 x 1.2612 = 6.306.

Hence the function is given by:

$y = 6.306(1.2612)^x$

Then, when x = 4, we have that:

$y = 6.306(1.2612)^4 = 15.95$

More can be learned about exponential functions at brainly.com/question/25537936

#SPJ1

5 0

2 years ago

What substitution Should be used to re-write 26(x^3+1)^2-22(x^3+1)-3=0 as a quadratic function?

mel-nik [20]

Answer:

$x^3+1$

Step-by-step explanation:

$26(x^3+1)^2-22(x^3+1)-3=0$

Comparing to

$A(u)^2+B(u)+C =0$

Where A,B,C are constants

You should see that we need to substitute the $x^3+1$ with u.

7 0

3 years ago

|-25.6|+|-11.4| What is the answer to this

12345 [234]

37. The absolute value symbol turns any negative number positive if it's within those brackets, so that's why the answer is positive. Hope this helped!

3 0

3 years ago

a. Tomato juice, 46 oz. can for $2.53 would = b. Tomato juice, 6-pack of 10 oz. cans for $4.50 would = c. The best buy would be

BARSIC [14]

Answer:

Tomato juice, 46 oz. can for $2.53

Step-by-step explanation:

we will find cost of 1 oz of tomato juice in each case

option-A:

46 oz tomato juice = $2.53

so,

$1oz=\frac{2.53}{46}$

1 oz tomato juice = $0.055

option-B:

6-pack of 10 oz tomato juice = $4.50

so, total amount of juice is

$=6\times 10oz$

$=60oz$

60 oz tomato juice = $4.50

so,

$1oz=\frac{4.50}{60}$

1 oz tomato juice = $0.075

We should always go for cheapest rate

so, the best buy would be

Tomato juice, 46 oz. can for $2.53

6 0

3 years ago

what is 64% of 75 tile Also include an explanation, I don't really understand what my teacher explained to my class

VARVARA [1.3K]

You can find what 1% is of 75 by dividing 75 by 100 in a calculator, which is .75
Next you can do .75*64, which is 48.

5 0

3 years ago

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Help ill mark brainliest if right ​

Help ill mark brainliest if right