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3 years ago

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h best describes the relationship between the successive terms in the sequence shown? 9, –1, –11, –21, … The common difference i

s –10. The common difference is 10. The common ratio is –9. The common ratio is 9.

1 answer:

My name is Ann [436]3 years ago

4 0

-1=9 + (-10)
-11=-1+ (-10)

⇒ the common ratio is -10

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$\begin{gathered} \text{diameter,d}=2\times radius,r \\ d=2r \\ r=\frac{d}{2} \\ r=\frac{12m}{2} \\ r=6m \end{gathered}$

The height is given as 9meters

Substituting for r and h in the formula will give

$\begin{gathered} A_{cylinder}=2\pi r^2+2\pi rh \\ r=6m;h=9m;\pi=3.14 \\ A_{cylinder}=2\times3.14\times6^2+2\times3.14\times6\times9_{} \end{gathered}$ $\begin{gathered} A_{cylinder}=6.28\times36+6.28\times54 \\ =226.08+339.12 \\ =565.2m^2 \end{gathered}$

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1 year ago

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Nataly_w [17]

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3 years ago

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2 years ago

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3 years ago

To be considered for pilot school, 12 students took a spatial reasoning test that resulted in this list of scores. Find the valu

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Answer:

the 90th percentile is 145

Step-by-step explanation:

Data provided:

152 121 130 143 122 101 137 98 138 127 145 117

Number of students considered, n = 12

To find:

90th percentile

Now,

Step 1 : Arrange the data in ascending order

98, 101, 117, 121, 122, 127, 130, 137, 138, 143, 145, 152

Step 2 : Compute the position of the 90th percentile

position of the 90th percentile, i = (90% × n)

Thus,

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or

i = 10.8

Now,

Step 3 : Since, the index i is not an integer, round up to the nearest integer

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3 years ago