All categories

2 years ago

Need help due friday

Mathematics

1 answer:

Ronch [10]2 years ago

7 0

Answer:

C. f(x) = 40(1/4)^x

Step-by-step explanation:

Check all the options:

When x = 0

A. f(x) = 1/4(40)^x

f(x) = 1/4(40)^0

f(x) = 1/4(1)

f(x) = 1/4

When x = 0

B. f(x) = 1/2(40)^x

= 1/2(40)^0

= 1/2(1)

f(x) = 1/2

When x = 0

C. f(x) = 40(1/4)^x

= 40(1/4)^0

= 40(1)

= 40

When x = 0

D. f(x) = 4(1/3)^x

= 4(1/3)^0

= 4(1)

= 4

You might be interested in

Simplify the expression: 1+4(2x-3)

irina1246 [14]

Answer:

8x - 11

Step-by-step explanation:

just do the multiplications and add things up.

1 + 4(2x - 3) = 1 + 8x -12 = 8x - 11

6 0

2 years ago

Read 2 more answers

Please answer letters A and B

omeli [17]

C & D my dudeo

Oh no! Something went wrong while adding your answer
It's too short. Write at least 20 characters to explain it well.

3 0

2 years ago

Suppose z varies directly with x and inversely with the square of y. If z = 18 when I = 6 and y = 2, what is z when I 7 and y =

madam [21]

It is given that z varies directly with x and inversely with the square of y so it follows:

$z=k\frac{x}{y^2}$

It is also given that z=18 when x=6 and y=2 so it follows:

$\begin{gathered} 18=k\frac{6}{2^2} \\ k=\frac{18\times4}{6} \\ k=12 \end{gathered}$

So the equation of variation becomes:

$z=12\frac{x}{y^2}$

Therefore the value of z when x=7 and y=7 is given by:

$\begin{gathered} z=\frac{12\times7}{7^2} \\ z=\frac{12}{7} \\ z\approx1.7143 \end{gathered}$

Hence the value of z is 12/7 or 1.7143.

6 0

4 months ago

The average test scores for a particular test in algebra was 84 with a standard deviation of 5. What percentage of the students

bija089 [108]

Answer:

The percentage of the students scored higher than 89% is 15.87%

Step-by-step explanation:

we are given

The average test scores for a particular test in algebra was 84

so, mean is 84

$\mu=84$

a standard deviation of 5

so,

$\sigma=5$

we have

x=89

now, we can use z-score formula

$z=\frac{x-\mu}{\sigma}$

now, we can plug values

$z=\frac{89-84}{5}$

$z=1$

now, we can use calculator

and we get

$p(z>1)=0.1587$

So,

The percentage of the students scored higher than 89% is 15.87%

5 0

2 years ago

Camille is working on her homework.she spends 20% of her total homework time on Science. If she spends 18 minutes working on Sci

ZanzabumX [31]

Answer:

90 minutes or 1 hour and 30 minutes

Step-by-step explanation:

If 18 minutes is 20% of the work time then you will have to get the 20% to 100% so i divided 20 by 100 and that got me 5 so I put 5 times 18 then that got me 90.

5 0

2 years ago