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3 years ago

Can someone help please me? I screenshot the question. I'm seriously terrible at math

Mathematics

1 answer:

Semenov [28]3 years ago

3 0

A = 100(1 + 0.06/12)^12*20
A = 100(1 + 0.005)^240
A = 100(1.005)^240
A = 100(3.3102)
A = 331.02 or A

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A spherical balloon has a 26-in diameter when it is fully inflated. Half of the air is let out of the balloon. Assume that the

Lady_Fox [76]

Answer:

Volume A = 4/3 x pi x r^3 = 4/3 x 3.14 x 13^3 = 9198.11 cubic inches

Volume B = 4/3 x pi x r^3 = 4/3 x 3.14x 7.5^3 = 1766.25 cubic inches

Diameter = 13 in

Step-by-step explanation:

8 0

3 years ago

What is the answer to this?

Digiron [165]

The answer would be distributive property:)

6 0

3 years ago

Read 2 more answers

Anyone know? I think its exponential but im not sure.

gavmur [86]

yep exponential, since it close to graph of

$y = {a}^{ - x}$

6 0

3 years ago

The number 21 is what percent of 75

lesantik [10]

Answer:

28 percent

Step-by-step explanation:

To find what percentage of a number another number is, you can basically just divide it, 21/75 then you can multiply it by 100, so 21/75=0.28, and then 0.28*100=28, 21 is 28 percent of 75

5 0

3 years ago

The equation for a parabola has the form y=ax2+bx+c, where a, b, and c are constants and a≠0. find an equation for the parabola

IRISSAK [1]

The equation of parabola is

$y= ax^2 + bx +c$

For point (-1,-9), equation of parabola is

$-9 = a(-1)^2 +b(-1)+c
\\
-9 = a -b+c$

For point (1,7), equation of parabola is

$7 = a(1)^2 + b(1)+c
\\
7 = a + b +c$

For point (-6,-14), equation of parabola is

$-14 = a(-6)^2 +b(-6)+c
\\
-14 = 36a -6b +c$

So we have three equations , which are

$a - b + c =-9,
\\
a + b + c = 7
\\
36a -6b+c = -14$

Subtracting first two equation will give

$-2b = -16
\\
b=8$

Subtracting second and third equation gives

$a+b+c-36a+6b-c = 7+14
\\
-35a +7b = 21
\\
-5a + b =3$

Substituting 8 for b, we will get

$-5a + 8 =3
\\
-5a = -5
\\
a =1$

back substituting 8 for b and 1 for a, we will get

$1+8+c = 7
\\
c = -2$

So we have

$a=1, b=8 and c=-2$

Therefore required equation is

$y= x^2 +8x-2$

7 0

3 years ago