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Aleks04 [339]
3 years ago
7

What is the surface area of the cube

Mathematics
2 answers:
Firlakuza [10]3 years ago
7 0
Your answer to this question is C 
Blizzard [7]3 years ago
6 0
Hello!

To find the surface area of a cube you use the equation

6 a^{2}

a is a side length

Put in the values we know

6* 9^{2}

Square the 9

6 * 81 = 486

The answer is C)486 mm^{2}
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Pls I need help ASAP <br><br> What is 2.5 - 1.4
Tema [17]

Answer:

1.1

Step-by-step explanation:

6 0
3 years ago
The exponential function f(x) = 3(5)x grows by a factor of 25 between x = 1 and x = 3. What factor does it grow by between x = 5
Delvig [45]

Answer:

B) 25

Step-by-step explanation:

Given exponential function:

f(x)=3(5)^x

The growth factor between x=1 and x=3 is 25.

To find the growth factor between x=5 and x=7

Solution:

The growth factor of an exponential function in the interval x=a and x=b is given by :

G=\frac{f(b)}{f(a)}

We can check this by plugging in the given points.

The growth factor between x=1 and x=3 would be calculated as:

G=\frac{f(3)}{f(1)}

f(3)=3(5)^3

f(1)=3(5)^1

Plugging in values.

G=\frac{3(5)^3}{3(5)^1}

G=\frac{(5)^3}{(5)^1} (On canceling the common terms)

G=(5)^{(3-1)}  (Using quotient property of exponents \frac{a^b}{a^c}=a^{(b-c)} )

G=(5)^{2}

∴ G=25  

Similarly the growth factor between x=5 and x=7 would be:

G=\frac{f(7)}{f(5)}

f(7)=3(5)^7

f(5)=3(5)^5

Plugging in values.

G=\frac{3(5)^7}{3(5)^5}

G=\frac{(5)^7}{(5)^5} (On canceling the common terms)

G=(5)^{(7-5)}  (Using quotient property of exponents \frac{a^b}{a^c}=a^{(b-c)} )

G=(5)^{2}

∴ G=25  

Thus, the growth factor remains the same which is  =25.

3 0
2 years ago
Read 2 more answers
What is the equation of the line passing through the points (4, -7.5) and (6, -3.5) in slope-intercept form?
Ratling [72]

Answer:

Your answer will be

y=2x-15.5

Step-by-step explanation:

Hi, there you must know the slope-intercept form which is

y=mx+b

m=slope

b=y-intercept

You can also use

the slope formula which is

\frac{y_2-y_1}{x_2-x_1}

in this case

it will look like this

\frac{-7.5-(-3.5)}{6-4}=\frac{-4}{2}=-2

So the slope is -2

Now we will find the y-intercept

-7.5=2(4)+b

-7.5=8+b   Subtract 8 both sides

-15.5=b

Your y-intercept is -15.5

Hope this helps

6 0
2 years ago
Last year, 400 signed up to take a virtual kickboxing class. This year, there was a 5% increase in registrations. How many peopl
ale4655 [162]

Answer:

420 people

Step-by-step explanation:

400*1.05=420

3 0
3 years ago
424.25 subtract 379.4
igor_vitrenko [27]
The answer is 44.85. Hope this helped! :)
7 0
3 years ago
Read 2 more answers
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