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2 years ago

HELP ASAP i need help 9th grade math!!

Mathematics

1 answer:

Leviafan [203]2 years ago

4 0

Answer:

yes

Step-by-step explanation:

this is because we are eliminating the same shape so the same amount of weight from both sides, therefore the mobile still balances

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how much would $200 dollars invested at 5% interest compounded monthly versus worth after 9 years? round to the nearest cent

Natalka [10]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$200\\
r=rate\to 5\%\to \frac{5}{100}\to &0.05\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{monthly, thus twelve}
\end{array}\to &12\\
t=years\to &9
\end{cases}
\\\\\\
A=200\left(1+\frac{0.05}{12}\right)^{12\cdot 9}\implies A=200(1.0041\overline{66})^{108}
\\\\\\
A\approx 313.3693298833$

4 0

2 years ago

These cylinders are similar. Find the surface area of the smaller cylinder. Round to the nearest tenth.

GarryVolchara [31]

Answer:

Surface area = 80.4 cm²

Step-by-step explanation:

The diagram of both cylinders is attached below for a better understanding.

<h3>First find the radius of larger cylinder:</h3>

Surface area = 2πrh + 2πr²

236 = 2(3.14)(5)r + 2(3.14)r²

236 = 31.4r + 6.28r²

236 = 6.28(r² + 5r)

35.58 = r² + 5r

r = 3.97 cm

<h3>Find the radius of Smaller cylinder:</h3>

Two cylinders are in proportion if their heights and radius are in proportion:

Ratio of height of small cylinder to big cylinder = 3/5 = 0.6

So ratio of radius of both is also 0.6

Let R be the radius of small cylinder

ratio of radius of small cylinder to big cylinder = R / 3.97

R = (0.6)(3.97)

R = 2.38

<h3 /><h3>Surface Area for small cylinder:</h3>

R = 2.38cm and h = 3 cm

Surface area = 2πrh + 2πr²

Surface area = 2(3.14)(2.38)(3) + 2(3.14)(2.38)²

Surface area = 80.4115cm²

Round of to nearest tenth

Surface area = 80.4 cm²

5 0

3 years ago

To which subset(s) of real numbers does the number 4 belong? 1. Irrational numbers 2. Integers 3. Whole numbers 4. Natural numbe

morpeh [17]

Answer:

whole number

hope it helps

5 0

3 years ago

Denise is designing the seating arrangement for a concert an outdoor theater. To give everyone a good view, each row must have 6

vesna_86 [32]

This is an Arithmetic Progression with 1st term 11 and common difference d=6

Number of Rows Number of seats    Common difference " d"
----------------------- ----------------------- -------------------------------------
1st    a₁ = 11
2nd a₁+d =17 d =2nd - 1st = 6
3rd    a₁ +2d = 23 d =3rd - 2nd = 6
4th    a₁ +3d = 29    d= 4th - 3rd = 6
-------------------------------------------------------------------------------
nth ROW a(n) = a₁ + (n-1)d
18th ROW a₁₈ = 11 + (18-1).6 = 11+(17)(6) = 113

General equation to predict the number of seat an the nth row:
Number of seats in nth row = a₁ + (n-1).d

8 0

3 years ago

Please ASAP answer this question:)

Darina [25.2K]

Answer:

17 in

Step-by-step explanation:

H²= 8²+15²

H²= 64+225

H²=289

H= √289

H= 17

8 0

3 years ago

Read 2 more answers