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serious [3.7K]
2 years ago
9

Find the area of a circle with a diameter of 8cm.

Mathematics
1 answer:
Elza [17]2 years ago
6 0

Answer:

50.24

Step-by-step explanation:

Area = r^2 x 3.14 (pi)

Radius = 8 ÷ 2 = 4

4² = 16

16 x 3.14 = 50.24

Area = 50.24 cm ²

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Which of the following situations could be represented by the expression - 14+ (- 7)?
RUDIKE [14]

Answer:

Matt's

Step-by-step explanation:

he has to give away $14 (-14)

and also $7 (-7)

The others have positive numbers.

4 0
3 years ago
Lines need to be painted on the field at a football stadium. The painter estimated that one can of paint would last 11 yards. Ho
zlopas [31]

Answer:  

area = pi*24^2/4 = 452 yd^2

so that means you will need 452/59 = 7.6 (or 8) gallons

8 0
2 years ago
Rearrange the equation so n is the independent variable.<br> m+1=-2(n+6)<br> m=
S_A_V [24]

Answer:

m=-2n-13

Step-by-step explanation:

m+1=-2(n+6)

m+1=-2n-12

   -1.        -1

--------------------

m=-2n-13

4 0
2 years ago
Read 2 more answers
How is the series 9 + 13+ 17+ ... + 149 represented in summation notation?
VLD [36.1K]

Notice that

13 - 9 = 4

17 - 13 = 4

so it's likely that each pair of consecutive terms in the sum differ by 4. This means the last term, 149, is equal to 9 plus some multiple of 4 :

149 = 9 + 4k

140 = 4k

k = 140/4

k = 35

This tells you there are 35 + 1 = 36 terms in the sum (since the first term is 9 plus 0 times 4, and the last term is 9 plus 35 times 4). Among the given options, only the first choice contains the same amount of terms.

Put another way, we have

\displaystyle 9 + 13 + 17 + \cdots + 149 = \sum_{k=0}^{35} (9 + 4k)

but if we make the sum start at k = 1, we need to replace every instance of k with k - 1, and accordingly adjust the upper limit in the sum.

\displaystyle 9 + 13 + 17 + \cdots + 149 = \sum_{k-1=0}^{35+1} (9 + 4(k-1))

\displaystyle 9 + 13 + 17 + \cdots + 149 = \sum_{k=1}^{36} (5 + 4k)

7 0
2 years ago
Which quotient is the same as the quotient 6.93÷0.4? Is it 693÷4 or 69.3÷4 or 69.3÷40 or 693÷0.004?
7nadin3 [17]
The answer will be 69.3÷4. Hope it help!
6 0
3 years ago
Read 2 more answers
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