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3 years ago

I need to know the answer to #7

Mathematics

1 answer:

frutty [35]3 years ago

6 0

since its 2 half circles calculate are for a circle would be area = piR^2

the diameter is 100 feet so radius would be 100/2 = 50 feet

using 3.14 for pi you get 50^2 x 3.14 = 7850 square feet for the circle area

rectangle area = l x w = 100 x 212 = 21200

now add them

21200 + 7850 = 29050 square feet

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Chris is building a model out of wire. He has a length of wire that measures 9/10 of a yard. If he cuts it into 5 equal parts, t

bazaltina [42]

$\displaystyle\\\frac{9}{10}~~\text{of a yard}~~=\frac{9}{10}~\text{yards}\\\\\frac{1}{5}~\text{from}~\frac{9}{10}~\text{yards}=\frac{1}{5}\times\frac{9}{10}=\frac{9}{50}~\text{yards each piece}$

3 0

3 years ago

The volume of a cylinder is 375 pi cm^3. The height is 15 cm. What is the radius of the cylinder

madam [21]

The radius is 3.27 cm, because I used the formula in reverse.

3 0

3 years ago

PLZ EXPLAIN AND I'LL GIVE BRAINLY!!!!

Nonamiya [84]

Hello there!

Given the sequence:

$\displaystyle \large{ 1, - 3,9, - 27,...}$

The question reveals it to be geometric sequence since it has common ratio.

Geometric Sequence / Ratio Formula

$\displaystyle \large{r = \frac{a_{n + 1}}{a_n} }$

Define 'r' as common ratio.

First, let's check the common ratio by using the formula above.

Ratio Check

$\displaystyle \large{r = \frac{ - 3}{1} \longrightarrow - 3 } \\ \displaystyle \large{r = \frac{ 9}{ - 3} \longrightarrow - 3 } \\ \displaystyle \large{r = \frac{ - 27}{9} \longrightarrow - 3 }$

Therefore, the common ratio or r-value is -3.

To find the 7th term of sequence, you can by using the General Geometric Terms.

General Term of Geometric

$\displaystyle \large{a_n = a_1 {r}^{n - 1} }$

a1 is defined as the first term of sequence.

r is common ratio.

n is the term.

Since we want to find 7th term:

a1 = 1
r = -3
n = 7

$\displaystyle \large{a_7 =1{( - 3)}^{7 - 1} } \\ \displaystyle \large{a_7 =1{( - 3)}^{6} } \\ \displaystyle \large{a_7 =729 }$

Therefore, the 7th term of this sequence is 729.

Let me know if you have any questions!

Topic: Sequence and Series / Geometric Sequence

7 0

3 years ago

What is the slope of the line that passes through (2,12) and (4,20)

iris [78.8K]

Answer:

D. 4

Step-by-step explanation:

Use rise over run, (y2 - y1) / (x2 - x1)

Plug in the points:

(y2 - y1) / (x2 - x1)

(20 - 12) / (4 - 2)

8 / 2

= 4

So, the slope is 4.

6 0

3 years ago

What is 3x45 I don't know the answer

geniusboy [140]

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4 years ago

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