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3 years ago

5

At a birthday party, all of the guests chose either vanilla or chocolate ice cream to be served with the cake for dessert.For th

eir choices, 21 guests had vanilla ice cream and 9 guests had chocolate.What percent of the guests had chocolate ice cream?

1 answer:

Hoochie [10]3 years ago

7 0

Answer:

0.3 or 30

Step-by-step explanation:

Unknown if that is right but hopefully it is correct. :)

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Answer:

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Step-by-step explanation:

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3 years ago

Find an explicit rule for the nth term of the sequence.The second and fifth terms of a geometric sequence are 18 and 144, respec

vova2212 [387]

Given:

second term = 18

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The nth term of a geometric sequence is:

$\begin{gathered} a_n\text{ = ar}^{n-1} \\ Where\text{ a is the first term} \\ r\text{ is the common ratio} \end{gathered}$

Hence, we have:

$\begin{gathered} \text{ar}^{2-1}\text{ = 18} \\ ar\text{ = 18} \\ \\ ar^{5-1}=\text{ 144} \\ ar^4\text{ =144} \end{gathered}$

Divide the expression for the fifth term by the expression for the second term:

$\begin{gathered} \frac{ar^4}{ar}\text{ = }\frac{144}{18} \\ r^3\text{ = }\frac{144}{18} \\ r\text{ = 2} \end{gathered}$

Substituting the value of r into any of the expression:

$\begin{gathered} ar\text{ = 18} \\ a\text{ }\times\text{ 2 = 18} \\ Divide\text{ both sides by 2} \\ \frac{2a}{2}\text{ =}\frac{18}{2} \\ a\text{ = 9} \end{gathered}$

Hence, the explicit rule for the sequence is:

$a_n\text{ = 9\lparen2\rparen}^{n-1}$

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1 year ago

The tree frog population in your back yard doubles every two weeks. Currently, there are 10 frogs in your back yard. Assuning th

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Answer:

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Step-by-step explanation:

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daser333 [38]

Answer:

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Step-by-step explanation:

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2 years ago